Everyone else, hello.
Just learned about a VERY swag Game Boy Advance Tetris "clone" called Apotris. Extremely customizable, can be as flashy or stripped-down as you want, has fantastic 'brickfeel' or whatever it is Tetris snobs say about the versions they like.
As someone who routinely soft-resets my brain by taking short breaks to play geometric puzzle games, I'm very pleased to add this is an extremely solid GBA game to my collection. It plays beautifully in OpenEmu and brims with features and modes. 5 stars.