Fix background not moving on some stage and change lv30 map
This game is a puzzle game. The game focuses on pushing box into the designated slot(s). The player can only push boxes forward and there will be walls that make the game more challenging. The player can only move up, down, left, or right and can only push one box at a time. later stage we add warp mechanic to the game allow more possibility for player to slove the puzzle
