Add win condition and related assets

Introduced new animations, prefabs, scripts, and textures to implement a win condition in the game. Updated InventoryScript to trigger the win state when the required coin count is reached. Added supporting assets such as win animations, GUI elements, and sound effects.

CollectCoins/Assets/Scripts/InventoryScript.cs

@@ -10,6 +10,8 @@ public class InventoryScript : MonoBehaviour {
 	public GUITexture coinPic;
     public GUIText coinGUIText;
 
+	public int winCoinCount = 20;
+	public GameObject winObj;
     void Start () {
 	
 	}
@@ -28,6 +30,13 @@ public class InventoryScript : MonoBehaviour {
         coinGUIText.SendMessage("showTextHint", coinCount.ToString());
         // 显示左下角图片和数量
 		showCoinCount();
+
+		if (coinCount == winCoinCount)
+		{
+			this.gameObject.GetComponent<CharacterController>().enabled = false;
+			this.gameObject.GetComponentInChildren<ShotScript>().enabled = false;
+			winObj.SendMessage("gameOver");
+		}
     }
 
 	void showCoinCount()