This was great! The enemies were varied, keeping the arenas interesting, and the two weapons were both useful throughout. Weapon feedback felt great too. Some instructions at the start of the level would have been nice, I played the first few levels with just the pistol and no understanding of the air controls. Once I figured that out though, the last two levels that require air control felt great to play. I think that in the last level, your movement controller really shined, since you can use air control and speed to your advantage. Earlier levels felt a bit cramped, especially since changing directions feels sluggish. With a bit more snappy movement, the turrets and skulls would probably be easier to dodge.
Overall, great work! Compliments on the art style as well, of course :)