I love this! Did you stop working on it?
Yes, months ago. I'm pretty sure other people are working on this kinda stuff, and GB Studio isn't really made for rhythm games. I'll probably make another GameBoy game in the future, but I'll probably stick to PC. By the way, how about checking out my other games instead of this one? :)
Edit: One more thing, if ANYONE is planning on improving this or building up on it, the project file is always avalible on my archive.org page.