Zoop
- Move around the middle square and fire down the lane you face.
- Pieces of your color vanish; the first different color swaps with you.
- Clear enough to finish the level. Let one into the middle and it's over.
- Spring clears its lane
- Bomb clears a 3×3 area
- Rainbow clears your color
- Freeze pauses new pieces
Arrow keys or WASD to move, Space to fire, P to pause. Tap a lane to fire down it.