diff --git a/src/game.js b/src/game.js
index 28770ea..4954040 100644
--- a/src/game.js
+++ b/src/game.js
@@ -128,14 +128,13 @@ class Game {
           case 'obstacle': {
             this.toggleButtonActive(true);
             this.failed();
-            break;
+            return; // checkCollision() 반복 호출 종료
           }
           case 'coin': {
             this.audio.playEffect('coin');
             this.score.add(entity.point);
             entity.touched = true;
             entity.hide(entity);
-            break;
           }
         }
       }
@@ -160,10 +159,6 @@ class Game {
 
     return isHorizontalOverlap && isVerticalOverlap;
   }
-
-  isPassed(marioRect, obstacleRect) {
-    return marioRect.left > obstacleRect.right; // 마리오가 장애물 넘었는지 확인
-  }
 }
 
 export default Game;