I'm not a fan of rhytm games in general especially since my music taste does not agree with a lot of these games. The idea to go trough time and chance the music accordingly to this sounds fun! But its not for me and how my version of this music time machine wold sound. If it was with super short levels it would be alrigth just to see where it goes, but the songs are way to long for me to do this. I did just let the game go without playing since i do want to see what you guys did!
So for me it would be a lot more fun if it was a time back machine that went back every 30 sec of a song or something like this. but then i still don;'t like these type of games :P But i must say the music does sound great since its made for this gamejam right? So thats amazing! Even if its not my style its still impressive! So i will rate the music high for this reason :)