Melody's escape is a rhythm game which has levels generated off of factors in an audio file such as tempo, beat, etc.
No, none of them are premade The game makes them on the spot using algorithms. For instance, you slide on ramps during long notes or vocals.
DO YOU NOT SEE HOW COOL THAT IS!?
Discuss.

OH YES! Melody's Escape is incredibly awesome
I love it so much now, even more than guitar hero and osu.
You all should give Melody's Escape a try, because it's an amazing game.
If you want to try it get it from http://www.melodyescape.blogspot.com then buy the full license.
Best game ever for me.