- Rotate piece = Up arrow
- Move left/right = Left/right arrow
- Move down more quickly = Down arrow
- Restart after Game Over = R
Score points and clear space on the board by forming square groups of 16 blocks. If left for too long, square groups of 9 blocks will solidify. Once solid they cannot be removed and must be
converted back to 9 individual blocks by eliminating an immediately adjacent square group of 16 blocks.
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