Fun to play, but I didn't feel like the game gave me enough feedback on when I was actually shooting the enemies - instead I'd pour fire on and not be sure if I was hitting. Also the timer would sometimes get away from me without me seeing since my focus was on dodging the waves of enemy bullets. I would die, and not quite know why, which was a little frustrating.
The enemy bullet patterns were excellent. The asteroids felt a little unfair, but I guess I had enough life to tank a few hits.
The powerups were nice, but a little hard to visually identify in the heat of the moment.