Quadrapassel
Fit falling blocks together

Quadrapassel is a derivative of a classic Russian falling-block game.
Reposition and rotate the blocks as they fall, and attempt to fit them together.
When you form a complete horizontal row of blocks, the row will disappear and
you score points. The game is over when the blocks get stacked too high. As your
score gets higher, you level up and the blocks fall faster.