A Tetris clone, and also the first cartridge I have posted on the forum.
Contains no animation, and messy code.
O and X for rotation. By default, O rotates counter-clockwise, X clockwise, but it can be swapped.
Left and right moves pieces.
Down for soft drop.
Up for quick drop, but can be turned off.
Tab (2P O button) is used for hold. Can be turned off.