At this part if(moveKey.right.pressed) { finishPostion += 5 platforms.forEach((platform) => { platform.place.x -= 5 }) decors.forEach((decor) => { decor.place.x -= 5; }) } The line decors.forEach((decor) => { decor.place.x -= 5; }) is not working. I checked the whole code but couldn't find any issues. I use npm to start a local host server on this code