Knight Owls by blaise-rascal is a new roguelike strategy game for the Game Boy Advance.
The goal of the game is to gather owls and upgrades while managing your health and money. Voyage through three enemy-filled zones, and defeat the final boss to win. But beware: Summoning magic is risky, and if you lose all of your HP, you will have to start the game over from the beginning. The game is fully playable in-browser with a keyboard (no mouse required). But you can also download it and play it on a desktop emulator, or run it on an actual Game Boy Advance using a flash cartridge.