Carefully stack the shapes in this fun physics puzzle game!

The gameplay in this game couldn't be simpler. That doesn't mean it's easy though! At the top of the screen is a queue of shapes. Every time you click the mouse you will place the next shape (the one that is currently highlighted in a box). You must carefully place the shapes on the screen so that none fall off. Be careful, some shapes are bigger than others. You can tell what size the shapes are by looking at the dimensions shown below each one. Good luck and happy stacking!