Beat Hazard might have been the first MP3-powered shmup, and a fine one at that. Still, it needed a few refinements, and TZAI Entertainment is running with the torch.
SHMUSICUP (Shoot Music Up) creates bullet patterns directly from your MP3s, and the results are drastically different. See for yourself.
SHMUSICUP isn’t out yet, but you can bet I’ll be keeping an eye on this one. I have some Dragonforce to fend off.