I enjoyed playing this quite a bit. It's just the kind of comfy mix of grind and leveling that ends up making me forget the time. The one complaint I have is that the rage system seems to be tied to the music loop. Unless I'm missing something it seems that when I trigger rage, the game waits for the music to hit the loop point and then switches on rage mode? Was this to keep the transition between tracks smooth? I had a few sticky situations where I wanted to rage out but sadly the delay between when i hit the button and when rage actually activated was the run killer.
As for the adaptive music part, was it limited to the track switching for rage/not rage?
Anyways really cool work on this, I enjoyed what you made!