I made Multiplayer Tetris! Left & Right to move, Up & Down to rotate, Hold A to soft drop, Release A to hard drop, and press B to hold. Clearing lines adds to your score but also sends an attack to your opponent, just like in modern Tetris. You have a while to counter their attack, but if you don’t you’ll be sent garbage from the bottom of your board. There is SRS for anyone who wants that as well
I made these for the kids at my work since we use Makecode Arcade to teach them coding. They get to play Tetris and hopefully learn something from the code!
Single-player version with levels instead of an opponent: