Great game! I liked many of the mechanics, though I'm a bit sad that I never got to use the volcano-looking spell (since that's right before the end of the game). I also found myself clearing rooms purely to speed up walking.
Did the music change for each boss? It sounded like you put a lot of effort into the music. The side bars being used as an indicator (red = can't pass until everyone is dead, blue = dispel) was a nice touch.