diff --git a/leaky-ships/lib/hooks/useGameEvent.ts b/leaky-ships/lib/hooks/useGameEvent.ts
index 7948092..31b5fd3 100644
--- a/leaky-ships/lib/hooks/useGameEvent.ts
+++ b/leaky-ships/lib/hooks/useGameEvent.ts
@@ -47,6 +47,10 @@ function useGameEvent(count: number) {
             .reduce((prev, curr) => [...prev, ...curr], [])
     }, [mode])
 
+    const isHit = useCallback((x: number, y: number) => {
+        return hits.filter(h => h.x === x && h.y === y)
+    }, [hits])
+
     const settingTarget = useCallback((isGameTile: boolean, x: number, y: number) => {
         if (!isGameTile || isHit(x, y).length)
             return
@@ -64,16 +68,12 @@ function useGameEvent(count: number) {
 
             }
         })
-    }, [count, hits, targetList])
+    }, [count, isHit, targetList])
 
     const isSet = useCallback((x: number, y: number) => {
         return !!targetList(target).filter(field => x === field.x && y === field.y).length && target.show
     }, [target, targetList])
 
-    const isHit = useCallback((x: number, y: number) => {
-        return hits.filter(h => h.x === x && h.y === y)
-    }, [hits])
-
     const composeTargetTiles = useCallback((target: Target): PointerProps[] => {
         const { preview, show } = target
         const result = targetList(target).map(({ x, y, type, edges }) => {
@@ -88,7 +88,7 @@ function useGameEvent(count: number) {
             }
         })
         return result
-    }, [hits, isSet, targetList])
+    }, [isHit, isSet, targetList])
 
     // handle visibility and position change of targetPreview
     useEffect(() => {
@@ -101,7 +101,7 @@ function useGameEvent(count: number) {
             setTargetPreview(e => ({ ...e, show: false }))
         if (!show && mouseCursor.shouldShow && eventReady && appearOK && !isHit(x, y).length && !isSet && !hasLeft)
             setTargetPreview(e => ({ ...e, show: true }))
-    }, [targetPreview, mouseCursor.shouldShow, hits, eventReady, appearOK, lastLeftTile, target])
+    }, [targetPreview, mouseCursor.shouldShow, isHit, eventReady, appearOK, lastLeftTile, target])
 
     // enable targetPreview event again after 200 ms.
     useEffect(() => {