Rotate and stack the figures to obtain a perfect balance. It's about moving the figures from the top area (the one that is over the dotted line) to the bottom one, so they are both balanced. The game includes 40 levels of increasing difficulty.
Click and drag to move the pieces, then click again to release them where you want. A/D keys or arrow keys left/right to rotate each figure while you're moving it. When you finished moving the last figure you can test the balance: if it's good, go to the next level by clicking 'NEXT'.