Super Stacker 2 (http://www.thegamehomepage.com/play/super-stacker-2/)

A fun little physics puzzle game where your only goal is to stack shapes and keep them stable for a set amount of time. Pieces appear at your cursor in the order shown at the top of the screen. Gently place them and, when the last block is set, the clock starts ticking. Cross your fingers and hope gravity is on your side.