Nice, fast paced arcade with some lovely music :) I intended to just take a glimpse but ended up playing quite a while. 9000 points on my best run. The first ship seems to be the best for me, I suck at others even more. For some reason, I always forget to move the ship while shooting...
Some minor suggestions:
- Secondary weapon readiness could be indicated as a crosshair color etc. so I wouldn't have to move my eyes from the battle.
- It's sometimes hard to perceive the speed and movement. Parallax scrolling might help to indicate slow and fast movement simultaneously.
- UI could be more responsive: menu texts go easily outside the screen. (Common prototyping thing.)
I hope you keep developing this.