A Game of Player(s) Blue(s)

welcome to a game of player(s) blue(s): a deconstruction of the well-known sokoban puzzle. the aim of the game is to move the blue color(s) onto their respective targets. there is 10 levels where the core elements multiply for each level-up.

rules:
- you control the player(s) by pressing the arrow keys.
- you can undo your actions by pressing 'z'.  (important in the later levels!)
- you push the blue colors around. they need to go on the gray-white target.
- the black-gray color cannot be pushed.