I haven't checked the App/Play stores for Tetris-like games, so I'm sure that my suggestion to override the volume button as the rotate button in Tetris is prob

I haven't checked the App/Play stores for Tetris-like games, so I'm sure that my suggestion to override the volume button as the rotate button in Tetris is probably old-hat. If it's not, then perhaps this is the key (excuse the pun) to providing it to the mobile world. Note, that the touch screen would be required to move the blocks left-right and accelerate down.