The graphics could definitely use some work - inconsistent use of outlines, colors, plus the background has aliasing for some reason - but the gameplay's actually pretty good. It does get a bit repetitive with only two enemy types and no powerups and stuff, but it is fairly difficult so that's not too bad.
There is a bug where you can get the rapid fire from dashing without moving, though, which makes the game a fair bit easier, though.
Overall. a surprisingly good game.