Not bad, interesting game dynamic. However, the keyboard controls do not activate objects that are activated when the mouse is clicked. So in the level with the blocks surrounded by saws (which I think may be the level 18 Toni is referring to below) a player using only a keyboard can not win. A player using a mouse can win. And a player using both can win very easily. You should make it so that clicking with the mouse or pressing x on the keyboard activate these things, as not all players will want to use both.