Well, it looks like my first GBA game will be pong, but my second one will be battleship, as was suggested by Noaktree. I've already determined which bitmap mode I will be using, namely, mode 5. I think I will need a built in double buffer. I don't really care about the low resolution, I won't be needing a huge resolution for pong. I'll make sure to release the code with the game, as it should have some interesting GBA tidbits.