Under rating threshold (hideshow)
The enemies shoot very fast and the bullets are very fast, it has an 'avoider' element almost moreso than a 'shooter' element. Also, a damage upgrade would be nice, maybe make like different weapons, like a laser or something, with different shapes, it would give it a less mindless feel. Possibly raise upgrade costs as you progress through the levels. I like the destroyer boss. 5/5. :3