Great job! Music really gives it that retro shmup feel. The malfunctions were a masterful twist, even if that thruster malfunction made me nervous a lot. Things did start to feel a little stale by the 3rd and 4th rounds. Perhaps either more malfunctions or making the existing ones more intense would've gotten the job done? In any case, I think this is quite a solid entry for 1 week. Nice work!