I'm developing a game with the Phaser will be for mobile and tablets. In the black border area have a TileMap and a sprite. The sprite is the character that moves within the TileMap by tween move. He's walk tile by tile. The TileMap size varies according to the level, with the maximum 10x16. In red border area has buttons which control the character to walk. The problem is that when I walk with the character down, it leaves the TileMap and go to buttons. What do you suggest me for a game like this?