feat: add shake effect

css/game.css

@@ -5,8 +5,10 @@
   }
   #desktop{
     position: absolute;
-    /*background-image: url('../asset/pic/qinshihuang/desktop.png');*/
     background-repeat: no-repeat;
+  }
+  #desktop img{
+    position: absolute;
     z-index: 1;
   }
   #restaurant .customer img {
@@ -157,3 +159,15 @@
   #kung-pao-chicken img{
     display: none;
   }
+
+/* 定义抖动动画 */
+@keyframes shake {
+    0%, 100% { transform: translateX(0); }
+    10%, 30%, 50%, 70%, 90% { transform: translateX(-10px); }
+    20%, 40%, 60%, 80% { transform: translateX(10px); }
+}
+
+.shake-animation {
+    animation: shake 0.8s; /* 动画持续时间 */
+    animation-timing-function: ease-in-out;
+}