Apotris is an absolutely stellar block stacking game for the GBA by @akouzoukos, which supports guideline rules, several game modes, heavy customisability, a banging soundtrack, and link cable multiplayer. Last month it had a physical release by insideGadgets, which sold out pretty quick, but is now back in stock.
You can order a cart (with optional rumble!) from shop.insidegadgets.com/product/apotris
or read more and grab the ROM from akouzoukos.itch.io/apotris/devlog/452358/apotris-v34-physical-release