How to play
Push every box onto a circle to finish a level. There are six levels; finishing one unlocks the next. You can push one box at a time, but cannot pull boxes or move through walls.
Move with the arrow keys, WASD, the direction buttons, or a swipe across the board. Undo takes back your last move; Restart resets the current level.
Space pauses and resumes while the board has focus. Clicking outside the game or switching windows pauses automatically. Reloading returns to level one.