Rotate Block: Up / Down Arrow Keys
Move Block Sideways: Right / Left Arrow Keys
Move Block Downwards: Spacebar
Pause: P
End Current Game: R
To activate a special, press the corresponding key that appears next to it in the display to the right.
To change the special keys, first pause the game, then press the key that you want to change. After that, press the new key that you want the special to be activated on.
Note: You can only activate specials with the number and letter keys.
Installing Music Packs
To install a music pack simply extract everything in the zip file to the directory containing the game exe. Make sure to overwrite any existing musicsettings.ini file.
Scoreboard
Metroid Headquarters is kindly hosting Tetroid's highscore board, which can be found here.
Submitting a highscore is easy in Tetroid - the game will ask if you wish to submit your score after completing a normal game. Timed games do not get their highscores sent.
Misc
Metroid Headquarters' Tetroid page is located here. They also have the music packs and main game up for download.
Tetroid has the ability to use custom music, a guide to adding your own music is located at the end of this post.