Another one that isn't mine and isn't really a hack more than it is built from scratch on the GBA and other platforms but it's one I mentioned in the Discord earlier in the week and figured I'd copy and paste it over here. This was one that I found when I was looking for GBA homebrews and it's easily one of the best I've seen.
If you've played Tetris, you almost certainly know what you're looking at. I've been following this project for a little over a year now and it keeps getting better as time goes on but, as it is now, you're still getting a very full package with some bounds of customization.
Looks real chic on the actual thing too.
