This is really fun. The music strikes me as nostalgic somehow, sorta close to maybe Sonic Adventure music.
I'm super curious about that memory usage though. Is there a known direct cause? What would need to be done for optimization if such was found? [I'm super interested in that techy stuff]
I don't know if this means anything right now, but while the memory use is still way up there both ways, going windowed [alt+enter] seems to help it at least a little.
Good luck ~!