Thanks for the reply! I meant the gravity, yes.
I get what you're saying, trying to make it stand out a bit from the rest. That's cool!
Actually, there are a lot of tetris games on the Gameboy, but only 2 on the GBA (The awful Tetris Worlds and Mina no soft - japan only) so this is why it's great that you made a homebrew version that is so good!
I don't try to take anything away, I'm just curious about what stuff it uses and what can and can't be done in it.