diff --git a/README.md b/README.md
index 64e3ca4..0e7eb4e 100644
--- a/README.md
+++ b/README.md
@@ -28,3 +28,8 @@
 一些想做但不确定会不会做的功能
 - [ ] 排行榜
 - [ ] 联机模式
+
+## 补充
+- 图标来自于：[iconify](https://iconify.design/)，同时使用了 [icones](https://icones.js.org/) 网站来预览图
+- 有趣的游戏音效来自：[Duolingo](https://www.duolingo.com/)，因为我也是个Duolingo软件的忠实用户，很喜欢TA的音效设计。PS：请原谅我未经允许的使用😜
+- 项目技术栈为：Vue3 + Vite5 + TypeScript + TailwindCSS + VueRouter + VueUse + Pinia
diff --git a/src/composables/use-countdown.ts b/src/composables/use-countdown.ts
index f9c0378..1fadb18 100644
--- a/src/composables/use-countdown.ts
+++ b/src/composables/use-countdown.ts
@@ -19,14 +19,21 @@ interface Options {
   /**
    * 当倒计时结束时
    */
-  onEnd?: () => void
+  onFinished?: () => void
+
+  /**
+   * 当读秒改变时
+   * @param second {number}
+   */
+  // onChange?: (second: number) => void
 }
 
 export function useCountdown({
   times = 60,
   interval = 1,
   immediate = false,
-  onEnd = () => { },
+  onFinished = () => { },
+  // onChange = (second: number) => { },
 } = {} as Options) {
   let timeoutId: number
 
@@ -44,7 +51,7 @@ export function useCountdown({
     timeoutId = window.setTimeout(() => {
       remainder.value -= interval
 
-      remainder.value ? start(false) : onEnd()
+      remainder.value ? start(false) : onFinished()
     }, interval * 1000)
   }
 
diff --git a/src/composables/use-game-score.ts b/src/composables/use-game-score.ts
index f3c9dc5..d0cd987 100644
--- a/src/composables/use-game-score.ts
+++ b/src/composables/use-game-score.ts
@@ -39,6 +39,7 @@ export function useGameScore(
     timestamp.value = lastTime
     lastTimestamp = performance.now()
 
+    stopRecording()
     timestampId = window.setInterval(() => {
       timestamp.value += 1
     }, 1000)
@@ -52,23 +53,6 @@ export function useGameScore(
     showDeltaScore.value = false
   }
 
-  // 当页面不可见时停止计时
-  function onVisibilityChange() {
-    if (document.visibilityState === 'hidden') {
-      stopRecording()
-    } else {
-      startRecording(timestamp.value)
-    }
-  }
-
-  document.addEventListener('visibilitychange', onVisibilityChange)
-
-  onBeforeUnmount(() => {
-    stopRecording()
-
-    document.removeEventListener('visibilitychange', onVisibilityChange)
-  })
-
   return {
     timestamp,
     gameScore,
diff --git a/src/views/game/[level].vue b/src/views/game/[level].vue
index 62e9179..21040e3 100644
--- a/src/views/game/[level].vue
+++ b/src/views/game/[level].vue
@@ -67,16 +67,24 @@ const {
 
 const {
   value: countdown,
-  start: startCountdown,
-  reset: resetCountdown,
-} = useCountdown({ times: levelConfig.internal })
+  start: startPreviewCountdown,
+  reset: resetPrewiewCountdown,
+  pause: pausePreviewCountdown,
+} = useCountdown({
+  times: levelConfig.internal,
+  // 当倒计时结束时开始游戏并
+  onFinished: onFinishedPreviewCountdown,
+})
 
-let startTimeoutId = -1
+// 当预览倒计时结束时开始游戏计分, 取消所有预览块, 并设置游戏状态
+function onFinishedPreviewCountdown() {
+  // 开始计分计时
+  startRecording()
+  uncheckAllBlocks()
+  setGameStatus('playing')
+}
 
 async function startGame() {
-  resetCountdown()
-  startCountdown()
-
   updateHighestScoreStatus()
   generateRandomTargetBlock()
 
@@ -89,14 +97,9 @@ async function startGame() {
   // 设置游戏状态为预览模式
   setGameStatus('previewing')
 
-  clearTimeout(startTimeoutId)
-  // 延迟关闭预览模式
-  startTimeoutId = window.setTimeout(() => {
-    // 开始计分计时
-    startRecording()
-    uncheckAllBlocks()
-    setGameStatus('playing')
-  }, levelConfig.internal * 1000)
+  // 重置读秒并重新开始倒计时
+  resetPrewiewCountdown()
+  startPreviewCountdown()
 }
 
 function onCheckResult() {
@@ -186,12 +189,28 @@ function formatScore(score: number) {
   return numStr.replace(reg, ',')
 }
 
+// 当浏览器游戏标签不可见时暂停计时
+function onGameTabVisibilityChange() {
+  if (document.visibilityState === 'hidden') {
+    stopRecording()
+    pausePreviewCountdown()
+    return
+  }
+
+  // 可见时再重新开始读秒和预览模式的计时
+  startRecording(timestamp.value)
+  startPreviewCountdown()
+}
+
 onMounted(() => {
   startGame()
+
+  document.addEventListener('visibilitychange', onGameTabVisibilityChange)
 })
 
 onBeforeUnmount(() => {
-  clearTimeout(startTimeoutId)
+  stopRecording()
+  document.removeEventListener('visibilitychange', onGameTabVisibilityChange)
 })
 </script>
 
@@ -204,7 +223,7 @@ onBeforeUnmount(() => {
         </template>
       </h2>
 
-      <div class="mt-6 font-mono flex items-center justify-between leading-none gap-4 min-w-60">
+      <div class="my-6 font-mono flex flex-wrap items-center justify-center leading-none gap-4 max-w-96">
         <div class="flex items-center h-8 px-2 rounded-full border border-input bg-slate-100 dark:bg-slate-800 min-w-[75px]">
           <i class="i-solar-stop-bold text-lg mr-1 text-emerald-500" />
           <span class="flex-1 text-center">{{ checkedNumber }}/{{ targetBlocks.size }}</span>
@@ -215,7 +234,7 @@ onBeforeUnmount(() => {
           <span class="flex-1 text-center">{{ timestamp }}s</span>
         </div>
 
-        <div class="flex items-center h-8 px-2 rounded-full border border-input bg-slate-100 dark:bg-slate-800">
+        <div class="flex items-center h-8 px-2 pt-0.5 rounded-full border border-input bg-slate-100 dark:bg-slate-800">
           <i class="i-solar-health-bold text-lg mr-1 text-red-500" />
           <div v-if="gameHealth <= 5" class="w-4 h-4 mx-auto overflow-hidden">
             <div
@@ -233,17 +252,16 @@ onBeforeUnmount(() => {
           </div>
           <span v-else class="flex-1 text-center">{{ gameHealth >= 99 ? '99+' : gameHealth }}</span>
         </div>
-      </div>
 
-      <div class="mt-2 font-mono flex items-center justify-between leading-none gap-4 w-60">
+        <!-- 练习模式不展示最高分字段 -->
         <div v-if="level !== 'custom'" class="flex items-center h-8 px-2 rounded-full border border-input bg-slate-100 dark:bg-slate-800 min-w-[75px]">
-          <i class="i-solar-ranking-bold-duotone text-lg translate-y-[-1.5px] mr-1 opacity-70" />
-          <span class="flex-1 text-center">{{ highestScore }}</span>
+          <i class="i-solar-ranking-bold-duotone text-lg translate-y-[-1.5px] mr-1 text-yellow-400" />
+          <span class="flex-1 text-center max-w-80 truncate">{{ highestScore }}</span>
         </div>
       </div>
 
-      <div class="relative mb-4 text-4xl text-center">
-        <span class="z-10 font-medium">{{ formatScore(gameScore) }}</span>
+      <div class="relative mb-6 text-5xl text-center">
+        <span class="z-10 font-mono font-medium">{{ formatScore(gameScore) }}</span>
 
         <span v-if="showHighestScoreBadge" class="absolute -translate-x-2 text-xs rotate-45 inline-block font-bold px-2 rounded-full border-2 border-red-500 text-red-500">BEST</span>