This is the best and cleanest version of Tetris for any portable (not just GBA). Your game is up there with the likes of Jstris and Tetr.io for the best fan Tetris clone. Years of modern Tetris conditioned me to hard drop and hold, so Gameboy Tetris can not longer be my go-to.
Thanks for waking up one day and putting in the time to making this. You are a god--a Greek one at that. The GBA is my all-time favorite console, and I love seeing the support it still gets, years after its end. This is a wonderful community.