To complete the level you must stack a pile of gems that are worth your target dollars. Every dollar over the target, at the end of the level you get as a bonus added to your score. Pile them on top of each other to reach the height targat at the top. Take as long as you want, but you only have a limited number of gems to use. The number of blocks you have left at the end of the level gets added as a bonus as well.
How to play
* GemStack is controlled via the mouse and keyboard * Use the mouse to place and move around your gem. * Click the left button on the mouse to drop/place the gem. * Use the left or right arrow keys to rotate a gem. * Press P to pause the game.