itch.io

Pros:

1.  Achievements. Come on, guys. Where did you find time for this on 72 hour jam?
2. Cool cheaptune

Cons:

1.  Background musics restarts when you are re-entering main menu, from credits for example. Sounds clumpsy.
2.  Enemy looks like a bonus. Try to add some spikes on it.
3. Top bar is just a bar. Change it to health/oxygen bar. So it will be easier to track your status.
4. Static difficulty. Get booring very fast (At ~5000 score). Increase the speed/enemy amount each 1000 score.
5.  Firing is overrated, only evading is enought. Try to add more targets for my bullets. :)