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new file mode 100644
index 0000000..c5fa96d
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new file mode 100644
index 0000000..0ae38e3
--- /dev/null
+++ b/assets/_Game/Animations/ScoreObjectSpawn.anim.meta
@@ -0,0 +1,13 @@
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index 2993f6a..354b5ef 100644
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index 410ef3c..0b66ee3 100644
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+      },
+      {
+        "__id__": 167
+      },
+      {
+        "__id__": 170
+      },
+      {
+        "__id__": 173
+      },
+      {
+        "__id__": 176
+      },
+      {
+        "__id__": 179
+      },
+      {
+        "__id__": 182
+      },
+      {
+        "__id__": 185
+      },
+      {
+        "__id__": 188
+      },
+      {
+        "__id__": 191
+      },
+      {
+        "__id__": 194
+      },
+      {
+        "__id__": 197
+      },
+      {
+        "__id__": 200
+      },
+      {
+        "__id__": 203
+      },
+      {
+        "__id__": 206
+      },
+      {
+        "__id__": 209
+      },
+      {
+        "__id__": 212
+      },
+      {
+        "__id__": 215
+      },
+      {
+        "__id__": 218
+      },
+      {
+        "__id__": 221
+      },
+      {
+        "__id__": 224
+      },
+      {
+        "__id__": 227
+      },
+      {
+        "__id__": 230
+      },
+      {
+        "__id__": 233
+      }
+    ],
+    "_spawnTime": 1,
     "_id": "c3k9rnGyxBF4r6tlo4EOFa"
   },
   {
@@ -5772,14 +9360,14 @@
       "__id__": 2
     },
     "_prefab": {
-      "__id__": 145
+      "__id__": 241
     },
     "__editorExtras__": {}
   },
   {
     "__type__": "cc.PrefabInfo",
     "root": {
-      "__id__": 144
+      "__id__": 240
     },
     "asset": {
       "__uuid__": "f54a7c19-37d5-4255-9336-f6df0e956be7",
@@ -5787,7 +9375,7 @@
     },
     "fileId": "65yusfkDBDE68dh4sqPVS4",
     "instance": {
-      "__id__": 146
+      "__id__": 242
     },
     "targetOverrides": null,
     "nestedPrefabInstanceRoots": null
@@ -5800,154 +9388,154 @@
     "mountedComponents": [],
     "propertyOverrides": [
       {
-        "__id__": 147
+        "__id__": 243
       },
       {
-        "__id__": 149
+        "__id__": 245
       },
       {
-        "__id__": 150
+        "__id__": 246
       },
       {
-        "__id__": 151
+        "__id__": 247
       },
       {
-        "__id__": 152
+        "__id__": 248
       },
       {
-        "__id__": 153
+        "__id__": 249
       },
       {
-        "__id__": 154
+        "__id__": 250
       },
       {
-        "__id__": 156
+        "__id__": 252
       },
       {
-        "__id__": 157
+        "__id__": 253
       },
       {
-        "__id__": 158
+        "__id__": 254
       },
       {
-        "__id__": 159
+        "__id__": 255
       },
       {
-        "__id__": 160
+        "__id__": 256
       },
       {
-        "__id__": 161
+        "__id__": 257
       },
       {
-        "__id__": 162
+        "__id__": 258
       },
       {
-        "__id__": 163
+        "__id__": 259
       },
       {
-        "__id__": 164
+        "__id__": 260
       },
       {
-        "__id__": 165
+        "__id__": 261
       },
       {
-        "__id__": 166
+        "__id__": 262
       },
       {
-        "__id__": 167
+        "__id__": 263
       },
       {
-        "__id__": 168
+        "__id__": 264
       },
       {
-        "__id__": 169
+        "__id__": 265
       },
       {
-        "__id__": 170
+        "__id__": 266
       },
       {
-        "__id__": 171
+        "__id__": 267
       },
       {
-        "__id__": 172
+        "__id__": 268
       },
       {
-        "__id__": 173
+        "__id__": 269
       },
       {
-        "__id__": 174
+        "__id__": 270
       },
       {
-        "__id__": 175
+        "__id__": 271
       },
       {
-        "__id__": 176
+        "__id__": 272
       },
       {
-        "__id__": 177
+        "__id__": 273
       },
       {
-        "__id__": 178
+        "__id__": 274
       },
       {
-        "__id__": 179
+        "__id__": 275
       },
       {
-        "__id__": 180
+        "__id__": 276
       },
       {
-        "__id__": 181
+        "__id__": 277
       },
       {
-        "__id__": 182
+        "__id__": 278
       },
       {
-        "__id__": 183
+        "__id__": 279
       },
       {
-        "__id__": 184
+        "__id__": 280
       },
       {
-        "__id__": 185
+        "__id__": 281
       },
       {
-        "__id__": 186
+        "__id__": 282
       },
       {
-        "__id__": 187
+        "__id__": 283
       },
       {
-        "__id__": 188
+        "__id__": 284
       },
       {
-        "__id__": 189
+        "__id__": 285
       },
       {
-        "__id__": 190
+        "__id__": 286
       },
       {
-        "__id__": 191
+        "__id__": 287
       },
       {
-        "__id__": 193
+        "__id__": 289
       },
       {
-        "__id__": 195
+        "__id__": 291
       },
       {
-        "__id__": 197
+        "__id__": 293
       },
       {
-        "__id__": 199
+        "__id__": 295
       },
       {
-        "__id__": 201
+        "__id__": 297
       },
       {
-        "__id__": 203
+        "__id__": 299
       },
       {
-        "__id__": 204
+        "__id__": 300
       }
     ],
     "removedComponents": []
@@ -5955,7 +9543,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 148
+      "__id__": 244
     },
     "propertyPath": [
       "_name"
@@ -5971,7 +9559,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 148
+      "__id__": 244
     },
     "propertyPath": [
       "_lpos"
@@ -5986,7 +9574,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 148
+      "__id__": 244
     },
     "propertyPath": [
       "_lrot"
@@ -6002,7 +9590,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 148
+      "__id__": 244
     },
     "propertyPath": [
       "_euler"
@@ -6017,7 +9605,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 148
+      "__id__": 244
     },
     "propertyPath": [
       "_active"
@@ -6027,7 +9615,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 148
+      "__id__": 244
     },
     "propertyPath": [
       "_lscale"
@@ -6042,7 +9630,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "startSizeX",
@@ -6059,7 +9647,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "startSizeX",
@@ -6070,7 +9658,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "startSizeY",
@@ -6081,7 +9669,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "startSizeY",
@@ -6092,7 +9680,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "_shapeModule",
@@ -6103,7 +9691,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "duration"
@@ -6113,7 +9701,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "bursts",
@@ -6125,7 +9713,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "gravityModifier",
@@ -6136,7 +9724,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "_materials",
@@ -6147,7 +9735,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "_materials",
@@ -6158,7 +9746,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "renderer",
@@ -6169,7 +9757,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "_materials",
@@ -6183,7 +9771,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "renderer",
@@ -6197,7 +9785,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "renderer",
@@ -6208,7 +9796,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "startRotationX",
@@ -6219,7 +9807,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "startRotationY",
@@ -6230,7 +9818,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "startRotationZ",
@@ -6241,7 +9829,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "_velocityOvertimeModule",
@@ -6252,7 +9840,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "_velocityOvertimeModule",
@@ -6264,7 +9852,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "_velocityOvertimeModule",
@@ -6276,7 +9864,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "_velocityOvertimeModule",
@@ -6288,7 +9876,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "_forceOvertimeModule",
@@ -6299,7 +9887,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "_forceOvertimeModule",
@@ -6311,7 +9899,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "_rotationOvertimeModule",
@@ -6322,7 +9910,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "_rotationOvertimeModule",
@@ -6334,7 +9922,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "_rotationOvertimeModule",
@@ -6345,7 +9933,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "_rotationOvertimeModule",
@@ -6357,7 +9945,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "_rotationOvertimeModule",
@@ -6369,7 +9957,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "loop"
@@ -6379,7 +9967,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "playOnAwake"
@@ -6389,7 +9977,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "startColor",
@@ -6400,7 +9988,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "startColor",
@@ -6413,7 +10001,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "startColor",
@@ -6433,7 +10021,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "startColor",
@@ -6447,7 +10035,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "startColor",
@@ -6467,7 +10055,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "startColor",
@@ -6481,7 +10069,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "startColor",
@@ -6490,7 +10078,7 @@
       "3"
     ],
     "value": {
-      "__id__": 192
+      "__id__": 288
     }
   },
   {
@@ -6507,7 +10095,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "startColor",
@@ -6516,7 +10104,7 @@
       "4"
     ],
     "value": {
-      "__id__": 194
+      "__id__": 290
     }
   },
   {
@@ -6533,7 +10121,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "startColor",
@@ -6542,7 +10130,7 @@
       "5"
     ],
     "value": {
-      "__id__": 196
+      "__id__": 292
     }
   },
   {
@@ -6559,7 +10147,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "startColor",
@@ -6568,7 +10156,7 @@
       "6"
     ],
     "value": {
-      "__id__": 198
+      "__id__": 294
     }
   },
   {
@@ -6585,7 +10173,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "startColor",
@@ -6594,7 +10182,7 @@
       "7"
     ],
     "value": {
-      "__id__": 200
+      "__id__": 296
     }
   },
   {
@@ -6611,7 +10199,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "startColor",
@@ -6620,7 +10208,7 @@
       "8"
     ],
     "value": {
-      "__id__": 202
+      "__id__": 298
     }
   },
   {
@@ -6637,7 +10225,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "startColor",
@@ -6657,7 +10245,7 @@
   {
     "__type__": "CCPropertyOverrideInfo",
     "targetInfo": {
-      "__id__": 155
+      "__id__": 251
     },
     "propertyPath": [
       "startColor",
@@ -6744,32 +10332,32 @@
     "instance": null,
     "targetOverrides": [
       {
-        "__id__": 209
+        "__id__": 305
       }
     ],
     "nestedPrefabInstanceRoots": [
       {
-        "__id__": 144
+        "__id__": 240
       }
     ]
   },
   {
     "__type__": "cc.TargetOverrideInfo",
     "source": {
-      "__id__": 144
+      "__id__": 240
     },
     "sourceInfo": {
-      "__id__": 210
+      "__id__": 306
     },
     "propertyPath": [
       "_trailModule",
       "_particleSystem"
     ],
     "target": {
-      "__id__": 144
+      "__id__": 240
     },
     "targetInfo": {
-      "__id__": 211
+      "__id__": 307
     }
   },
   {
@@ -6787,22 +10375,22 @@
   {
     "__type__": "cc.SceneGlobals",
     "ambient": {
-      "__id__": 213
+      "__id__": 309
     },
     "shadows": {
-      "__id__": 214
+      "__id__": 310
     },
     "_skybox": {
-      "__id__": 215
+      "__id__": 311
     },
     "fog": {
-      "__id__": 216
+      "__id__": 312
     },
     "octree": {
-      "__id__": 217
+      "__id__": 313
     },
     "lightProbeInfo": {
-      "__id__": 218
+      "__id__": 314
     },
     "bakedWithStationaryMainLight": false,
     "bakedWithHighpLightmap": false
diff --git a/assets/_Game/Scripts/Environments/Goal.ts b/assets/_Game/Scripts/Environments/Goal.ts
index 41b091d..4dc9f09 100644
--- a/assets/_Game/Scripts/Environments/Goal.ts
+++ b/assets/_Game/Scripts/Environments/Goal.ts
@@ -1,5 +1,6 @@
 import { _decorator, CCInteger, Collider2D, Component, Contact2DType, Node } from 'cc';
 import { GameManager } from '../Manager/GameManager';
+import ObjectPool from '../Pool/ObjectPool';
 const { ccclass, property, float } = _decorator;
 
 @ccclass('Goal')
@@ -14,6 +15,7 @@ export class Goal extends Component {
     }
 
     private onContactBegin(selfCollider: Collider2D, otherCollider: Collider2D) {
-        GameManager.instance.goal(this._score, otherCollider.node);
+        ObjectPool.release(otherCollider.node);
+        GameManager.instance.goal(this._score);
     }
 }
diff --git a/assets/_Game/Scripts/Environments/DamageableObject.ts b/assets/_Game/Scripts/Environments/ScoreObject.ts
similarity index 61%
rename from assets/_Game/Scripts/Environments/DamageableObject.ts
rename to assets/_Game/Scripts/Environments/ScoreObject.ts
index ad73e93..2063d66 100644
--- a/assets/_Game/Scripts/Environments/DamageableObject.ts
+++ b/assets/_Game/Scripts/Environments/ScoreObject.ts
@@ -1,13 +1,31 @@
-import { _decorator, CCFloat, CCInteger, Collider2D, Color, Component, Contact2DType, Sprite, Vec3 } from 'cc';
+import {
+    _decorator,
+    Animation,
+    CCFloat,
+    CCInteger,
+    Collider2D,
+    Color,
+    Component,
+    Contact2DType,
+    Sprite,
+    Vec3,
+} from 'cc';
 import { GameManager } from '../Manager/GameManager';
+import IPoolable from '../Pool/IPoolable';
+import ObjectPool from '../Pool/ObjectPool';
+import Utilities from '../Utilities/Utilities';
+import { EventManger } from '../Manager/EventManger';
+import GameEvent from '../Events/GameEvent';
 const { ccclass, property, float } = _decorator;
 
-@ccclass('DamageableObject')
-export class DamageableObject extends Component {
+@ccclass('ScoreObject')
+export class ScoreObject extends Component implements IPoolable {
     @property({ type: Collider2D, visible: true })
     private _collider: Collider2D;
     @property({ type: Sprite, visible: true })
     private _sprite: Sprite;
+    @property({ type: Animation, visible: true })
+    private _spawnAnimation: Animation;
     @property({ type: CCInteger, visible: true })
     private _score: number;
     @property({ type: CCFloat, visible: true })
@@ -15,10 +33,12 @@ export class DamageableObject extends Component {
 
     private _flyDirection: Vec3;
     private _targetColor: Color;
+    private _originColor: Color;
     private _hitted = false;
 
     protected onLoad(): void {
         this._collider.on(Contact2DType.BEGIN_CONTACT, this.onContactBegin, this);
+        this._originColor = this._sprite.color.clone();
     }
 
     protected update(dt: number): void {
@@ -28,13 +48,15 @@ export class DamageableObject extends Component {
             this.node.worldPosition = this.node.getWorldPosition().add(pos);
 
             const scale = new Vec3();
-            Vec3.multiplyScalar(scale, Vec3.ONE.clone(), 0.5 * dt);
+            Vec3.multiplyScalar(scale, Vec3.ONE.clone(), 1 * dt);
             this.node.scale = this.node.getScale().add(scale);
 
             this.node.angle += 800 * dt;
 
-            this._sprite.color = this._sprite.color.clone().lerp(this._targetColor, 2 * dt);
+            this._sprite.color = this._sprite.color.clone().lerp(this._targetColor, 1 * dt);
             if (this._sprite.color.a == 0) {
+                EventManger.instance.emit(GameEvent.ScoreObjectRelease, this.node);
+                ObjectPool.release(this.node);
             }
         }
     }
@@ -54,4 +76,16 @@ export class DamageableObject extends Component {
             GameManager.instance.destroyEnviromentsObject(this._score);
         }
     }
+
+    public reuse() {
+        this._spawnAnimation.play();
+        this._collider.enabled = true;
+    }
+
+    public unuse() {
+        this._hitted = false;
+        this.node.angle = 0;
+        this.node.setScale(Vec3.ONE);
+        this._sprite.color = this._originColor;
+    }
 }
diff --git a/assets/_Game/Scripts/Environments/DamageableObject.ts.meta b/assets/_Game/Scripts/Environments/ScoreObject.ts.meta
similarity index 70%
rename from assets/_Game/Scripts/Environments/DamageableObject.ts.meta
rename to assets/_Game/Scripts/Environments/ScoreObject.ts.meta
index a298440..614d7bd 100644
--- a/assets/_Game/Scripts/Environments/DamageableObject.ts.meta
+++ b/assets/_Game/Scripts/Environments/ScoreObject.ts.meta
@@ -2,7 +2,7 @@
   "ver": "4.0.23",
   "importer": "typescript",
   "imported": true,
-  "uuid": "ab3ad722-8023-4c3b-860b-1e0d4e70c746",
+  "uuid": "3bd17b6c-8e97-4c66-a38b-384e0258c904",
   "files": [],
   "subMetas": {},
   "userData": {}
diff --git a/assets/_Game/Scripts/Events/GameEvent.ts b/assets/_Game/Scripts/Events/GameEvent.ts
index ebf9cca..474581f 100644
--- a/assets/_Game/Scripts/Events/GameEvent.ts
+++ b/assets/_Game/Scripts/Events/GameEvent.ts
@@ -1,19 +1,23 @@
+import { Node } from 'cc';
 import GameState from '../Enum/GameState';
 import ScoreType from '../Enum/ScoreType';
 
 enum GameEvent {
     GameStateChange,
     Score,
+    ScoreObjectRelease,
 }
 
 export interface GameEventCallbackMap {
     [GameEvent.GameStateChange]: (state: GameState) => void;
     [GameEvent.Score]: (type: ScoreType, score: number) => void;
+    [GameEvent.ScoreObjectRelease]: (obj: Node) => void;
 }
 
 export interface GameEventArgMap {
     [GameEvent.GameStateChange]: GameState;
     [GameEvent.Score]: [ScoreType, number];
+    [GameEvent.ScoreObjectRelease]: Node;
 }
 
 export default GameEvent;
diff --git a/assets/_Game/Scripts/Gameplay/Ball.ts b/assets/_Game/Scripts/Gameplay/Ball.ts
index 7a153c7..bc4a9bb 100644
--- a/assets/_Game/Scripts/Gameplay/Ball.ts
+++ b/assets/_Game/Scripts/Gameplay/Ball.ts
@@ -23,6 +23,7 @@ import IPoolable from '../Pool/IPoolable';
 import { SoundManager } from '../Manager/SoundManager';
 import PhysicsGroup from '../Enum/PhysicGroup';
 import ObjectPool from '../Pool/ObjectPool';
+import Utilities from '../Utilities/Utilities';
 const { ccclass, property } = _decorator;
 
 @ccclass('Ball')
@@ -83,7 +84,11 @@ export class Ball extends Component implements IPoolable {
         }
     }
 
-    private onBeginContact(selfCollider: Collider2D, otherCollider: Collider2D, contact: IPhysics2DContact | null) {
+    private async onBeginContact(
+        selfCollider: Collider2D,
+        otherCollider: Collider2D,
+        contact: IPhysics2DContact | null,
+    ) {
         if (this._hitted) return;
         this._hitted = true;
         if (this._rigidbody.linearVelocity.length() >= 3) {
@@ -101,6 +106,8 @@ export class Ball extends Component implements IPoolable {
             hitfx.node.setWorldPosition(new Vec3(hitPoint.x, hitPoint.y, 10));
             hitfx.play();
             SoundManager.instance.playSfx(this._hitSound);
+            await Utilities.waitUntil(() => hitfx.isStopped, 100);
+            this._impactPool.release(hitfx.node);
         }
     }
 
diff --git a/assets/_Game/Scripts/Gameplay/Outer.ts b/assets/_Game/Scripts/Gameplay/Outer.ts
index c7db602..1310622 100644
--- a/assets/_Game/Scripts/Gameplay/Outer.ts
+++ b/assets/_Game/Scripts/Gameplay/Outer.ts
@@ -1,5 +1,6 @@
 import { _decorator, Collider2D, Component, Contact2DType, Node } from 'cc';
 import { GameManager } from '../Manager/GameManager';
+import ObjectPool from '../Pool/ObjectPool';
 const { ccclass, property } = _decorator;
 
 @ccclass('Outer')
@@ -12,6 +13,7 @@ export class Outer extends Component {
     }
 
     private onBeginContact(selfCollider: Collider2D, otherCollider: Collider2D) {
-        GameManager.instance.ballOut(otherCollider.node);
+        ObjectPool.release(otherCollider.node);
+        GameManager.instance.ballOut();
     }
 }
diff --git a/assets/_Game/Scripts/Manager/GameManager.ts b/assets/_Game/Scripts/Manager/GameManager.ts
index c8f2e10..5cd833a 100644
--- a/assets/_Game/Scripts/Manager/GameManager.ts
+++ b/assets/_Game/Scripts/Manager/GameManager.ts
@@ -62,18 +62,17 @@ export class GameManager extends Component {
         return ball;
     }
 
-    public async ballOut(ball: Node) {
+    public async ballOut() {
         this._balls--;
-        this._ballPool.release(ball);
         if (this._balls === 0) {
+            this._ballPool.clear();
             return;
         }
         await Utilities.delay(1000);
         this.spawnBall();
     }
 
-    public async goal(bonusScore: number, ball: Node) {
-        this._ballPool.release(ball);
+    public async goal(bonusScore: number) {
         this.addScore(bonusScore, ScoreType.Goal);
         await Utilities.delay(1000);
         this.spawnBall();
diff --git a/assets/_Game/Scripts/Manager/SpawnObjectManager.ts b/assets/_Game/Scripts/Manager/SpawnObjectManager.ts
index b05cf1d..c15adc7 100644
--- a/assets/_Game/Scripts/Manager/SpawnObjectManager.ts
+++ b/assets/_Game/Scripts/Manager/SpawnObjectManager.ts
@@ -1,4 +1,8 @@
-import { _decorator, Component, Node, Prefab } from 'cc';
+import { _decorator, CCFloat, Component, Node, Prefab, randomRangeInt } from 'cc';
+import ObjectPool from '../Pool/ObjectPool';
+import { ScoreObject } from '../Environments/ScoreObject';
+import { EventManger } from './EventManger';
+import GameEvent from '../Events/GameEvent';
 const { ccclass, property } = _decorator;
 
 @ccclass('SpawnObjectManager')
@@ -14,8 +18,49 @@ export class SpawnObjectManager extends Component {
     private _objects: Prefab[] = [];
     @property({ type: [Node], visible: true })
     private _spawnPoints: Node[] = [];
+    @property({ type: CCFloat, visible: true, range: [1, 10], slide: true })
+    private _spawnTime;
+
+    private _pools: ObjectPool[] = [];
+    private _usedPoints: { [key: string]: Node } = {};
+    private _timer = 0;
 
     protected onLoad(): void {
         SpawnObjectManager._instance = this;
+        EventManger.instance.on(GameEvent.ScoreObjectRelease, this.onObjectRelease, this);
+
+        for (let i = 0; i < this._objects.length; i++) {
+            const prefab = this._objects[i];
+            this._pools[i] = new ObjectPool(prefab, 10, true, ScoreObject);
+        }
+    }
+
+    protected start(): void {
+        for (let i = 0; i < randomRangeInt(5, 10); i++) {
+            this.spawn();
+        }
+    }
+
+    protected update(dt: number): void {
+        this._timer += dt;
+        if (this._timer >= this._spawnTime) {
+            this._timer = 0;
+            this.spawn();
+        }
+    }
+
+    private spawn() {
+        if (Object.keys(this._usedPoints).length == this._spawnPoints.length) return;
+        var randomPool = this._pools[randomRangeInt(0, this._pools.length)];
+        do {
+            var randomPoint = this._spawnPoints[randomRangeInt(0, this._spawnPoints.length)];
+        } while (Object.values(this._usedPoints).indexOf(randomPoint) != -1);
+        const obj = randomPool.get(this.node);
+        obj.setWorldPosition(randomPoint.worldPosition);
+        this._usedPoints[obj.uuid] = randomPoint;
+    }
+
+    private onObjectRelease(obj: Node) {
+        delete this._usedPoints[obj.uuid];
     }
 }
diff --git a/assets/_Game/Scripts/Pool/ObjectPool.ts b/assets/_Game/Scripts/Pool/ObjectPool.ts
index 92f3bca..050cff0 100644
--- a/assets/_Game/Scripts/Pool/ObjectPool.ts
+++ b/assets/_Game/Scripts/Pool/ObjectPool.ts
@@ -28,9 +28,17 @@ export default class ObjectPool {
             let obj = instantiate(this._prefab); // create node instance
             obj.removeFromParent();
             this._inactives.push(obj);
+            ObjectPool._poolLookUp[obj.uuid] = this;
         }
     }
 
+    //#region Static
+    private static _poolLookUp: { [key: string]: ObjectPool } = {};
+    public static release(obj: Node) {
+        ObjectPool._poolLookUp[obj.uuid].release(obj);
+    }
+    //#endregion
+
     public get(parent?: Node): Node;
     public get<T extends Component>(parent?: Node, classConstructor?: new () => T): T;
     public get<T extends Component>(parent?: Node, classConstructor?: new () => T): T | Node {
@@ -42,6 +50,7 @@ export default class ObjectPool {
         } else if (this._expandable) {
             // if not enough node in the pool, we call cc.instantiate to create node
             obj = instantiate(this._prefab);
+            ObjectPool._poolLookUp[obj.uuid] = this;
         } else {
             obj = this._actives.shift();
         }
@@ -57,7 +66,6 @@ export default class ObjectPool {
         if (classConstructor) {
             return handler == classConstructor ? handler : obj.getComponent(classConstructor);
         }
-
         return obj;
     }
 
@@ -84,5 +92,10 @@ export default class ObjectPool {
         this._inactives.forEach((obj) => obj.destroy());
         this._inactives = [];
         this._actives = [];
+        Object.keys(ObjectPool._poolLookUp).forEach((key) => {
+            if (ObjectPool._poolLookUp[key] === this) {
+                delete ObjectPool._poolLookUp[key];
+            }
+        });
     }
 }
diff --git a/assets/_Game/Scripts/Utilities/Utilities.ts b/assets/_Game/Scripts/Utilities/Utilities.ts
index f6e77cc..2b29135 100644
--- a/assets/_Game/Scripts/Utilities/Utilities.ts
+++ b/assets/_Game/Scripts/Utilities/Utilities.ts
@@ -8,6 +8,17 @@ export default class Utilities {
         return new Promise((resolve) => setTimeout(resolve, time));
     }
 
+    /**
+     *@param predicate
+     * @param time (ms)
+     * @returns
+     */
+    public static async waitUntil(predicate: () => boolean, timeCheck = 10) {
+        while (!predicate()) {
+            await this.delay(timeCheck);
+        }
+    }
+
     public static getJson(json: string): any {
         try {
             return JSON.parse(json);