Pixel Tower: block stacking game

A free stacking game in the browser: build Pixel's tower floor by floor.

1. A new floor slides over the top of the tower. Space, a click or a tap drops it.
2. Whatever hangs over the edge is cut off, so the next floor is narrower. If a floor misses the tower, or almost nothing of it is left, the game is over.
3. Land a floor right on top for a Perfect: it grows back a little. Three Perfects in a row give a bonus floor.
4. Every ten floors, up to the 60th, the view changes. Your best height is kept on this device.