diff --git a/src/KeyAdapters/tankKeyAdapter.js b/src/KeyAdapters/tankKeyAdapter.js
index c264342..68a75da 100644
--- a/src/KeyAdapters/tankKeyAdapter.js
+++ b/src/KeyAdapters/tankKeyAdapter.js
@@ -1,15 +1,15 @@
 import { GameKeyAdapterInterface } from "./gameKeyAdapterInterface";
-import {DirectionEnum} from "../Tanks/directionEnum";
+import { DirectionEnum } from "../Tanks/directionEnum";
 
-export class TankKeyAdapter extends GameKeyAdapterInterface{
+export class TankKeyAdapter extends GameKeyAdapterInterface {
 
-    constructor(tank){
+    constructor(tank) {
         super();
         this.tank = tank;
     }
 
-    handleEvent(event){
-        switch(event.key){
+    handleEvent(event) {
+        switch (event.key) {
             case "ArrowLeft":
                 this.tank.move(DirectionEnum.Left);
                 break;
diff --git a/src/game.js b/src/game.js
index 81d9dd4..75a10fd 100644
--- a/src/game.js
+++ b/src/game.js
@@ -1,4 +1,4 @@
-import { GameField } from "./Graphics/gameField";
+import { GameField } from "./GameLogic/gameField";
 import { TankKeyAdapter } from "./KeyAdapters/tankKeyAdapter";
 
 export function init() {
@@ -20,6 +20,11 @@ export class Game {
         let prevEv;
         let holding = (ev) => {
             if (!prevEv || prevEv.key != ev.key) return;
+            if (document.visibilityState == "hidden") {
+                alert("I'm hidden");
+                prevEv = undefined;
+                return;
+            }
             this.gameKeyAdapter.handleEvent(ev)
             requestAnimationFrame(() => holding(ev));
         }