This game needs your brain to guess how large the square should make to fit it down to the step without dropping into the hole. Just click and hold on the screen to make the square bigger and release the mouse click to drop the enlarged square downward. If the square fits into the step, you will get points and levels up otherwise game is over.
This is very simple game in terms of it's programming code as it has simple GUI with no sounds. Even though it is very fun and creative to play this game when you are bored because of it's simplicity.