diff --git a/src/core/main/game.ts b/src/core/main/game.ts
index fc074e5..be7f905 100644
--- a/src/core/main/game.ts
+++ b/src/core/main/game.ts
@@ -1,4 +1,5 @@
 import { EmitableEvent, EventEmitter } from '../common/eventEmitter';
+import { loading } from '../loader/load';
 
 export interface GameEvent extends EmitableEvent {
     /** Emitted in events.prototype.resetGame. */
@@ -8,3 +9,67 @@ export interface GameEvent extends EmitableEvent {
 }
 
 export const hook = new EventEmitter<GameEvent>();
+
+interface ListenerEvent extends EmitableEvent {
+    hoverBlock: (block: Block) => void;
+    leaveBlock: (block: Block) => void;
+}
+
+class GameListener extends EventEmitter<ListenerEvent> {
+    static num: number = 0;
+
+    num: number = GameListener.num++;
+
+    constructor() {
+        super();
+
+        loading.once('coreInit', () => {
+            this.init();
+        });
+    }
+
+    private init() {
+        // block
+        let lastHoverX = -1;
+        let lastHoverY = -1;
+        core.registerAction(
+            'onmove',
+            `@GameListener_${this.num}_block`,
+            (x, y, px, py) => {
+                if (core.status.lockControl || !core.isPlaying()) return false;
+                const bx = Math.floor((px - core.bigmap.offsetX) / 32);
+                const by = Math.floor((py - core.bigmap.offsetY) / 32);
+                const blocks = core.getMapBlocksObj();
+                if (lastHoverX !== bx || lastHoverY !== by) {
+                    const lastBlock = blocks[`${lastHoverX},${lastHoverY}`];
+                    const block = blocks[`${bx},${by}`];
+                    if (!!lastBlock) {
+                        this.emit('leaveBlock', lastBlock);
+                    }
+                    if (!!block) {
+                        this.emit('hoverBlock', block);
+                        lastHoverX = bx;
+                        lastHoverY = by;
+                    } else {
+                        lastHoverX = -1;
+                        lastHoverY = -1;
+                    }
+                }
+                return false;
+            },
+            50
+        );
+        core.canvas.data.canvas.addEventListener('mouseleave', () => {
+            if (core.status.lockControl || !core.isPlaying()) return;
+            const blocks = core.getMapBlocksObj();
+            const lastBlock = blocks[`${lastHoverX},${lastHoverY}`];
+            if (!!lastBlock) {
+                this.emit('leaveBlock', lastBlock);
+            }
+            lastHoverX = -1;
+            lastHoverY = -1;
+        });
+    }
+}
+
+export const gameListener = new GameListener();