Guide the little green monster to the exit by clearing away the blue and black shapes or rather by setting them in motion. You can also split the ground into two. Grab as many black tennis balls on your way to the exit!
At the top left you can choose an action: disappear, rise, change shape or split the ground into two pieces. When the mouse cursor is a red square, you can make items disappear.
When it's a blue triangle and you click on an item, you make it weightless and it will rise.
When the mouse cursor is a green square, you can change the shape of figures.
When the mouse cursor is a purple pentagon, you can split the ground below the monster into two.