Great concept and great music! I loved the synchronisation and the changes to the playing field! However, either I’m missing something, or there’s some sort of bug, because I defeated the Level 1 boss two times before the music ran out, and both times the game said “Failure” and didn’t let me advance to Level 2. I thought the objective is to kill the boss before the music ends? On another note, I think the enemies had a bit too much health, especially when having a low attack power. In any case, good job overall!