This is a pretty cool game but there's some things I'd change. First of all, make the tutorial interactive. Players don't like to read if they don't have to or if the text isn't story-related, and as such they don't take in the information as well as if they actively did it as part of the tutorial.
This game is doing a lot. It's not an awful idea, but it felt like you distributed your time across multiple different core mechanics rather than really polishing one. As such, it can get a little overwhelming. Some players enjoy this, but if you want to pander to a broader audience, having one solid mechanic supported by smaller, supporting mechanics, can be better.
The visuals and audio are great, but once again kind of suffer from cluttering. The way that gun shots overlap one-another can make it hard to tell where enemies are coming from, and the churning purple background mixed with asteroids, projectiles, enemies, can make it hard to track enemies at times. Easiest way to solve that is to make enemies pop out from the background - make them brighter, make them a contrasting colour, etc.
Overall, I still quite liked this game and I see potential in it. Keep up the good work!