Hey I gave the game a play. The overall space combat was really fun. There were a lot of things I didn't understand, which I'll go through below, but controls, art, and gameplay all work well for me, and I didn't encounter any bugs as far as I could tell. Here are some specific things I noted:
--The tutorial is pretty bad, with too much text (like there was too much story dialogue up front), and then the specific objectives were not clear, or didn't trigger. Like the up arrow was really confusing, since up arrow is a button. It should say something like "Make arrow point up". Then I prematurely destroyed the asteroid I was supposed to circle, so I couldn't get past that part of the tutorial. Luckily the controls are mostly intuitive, so I didn't have much trouble skipping to the main game. Probably some things I missed, though. I would say the only thing I'd change is rather than alt going down, maybe "C"?
--As I said, combat was good, and the targeting circle was really helpful with aiming
--Having more feedback around the upgrades you're getting would be good. I don't think you want to stop the play, but having it less text based, more icon based, would be good. Just so I know what's getting improved without having to read.
--I defeated the boss, but the event didn't trigger I think, so I was just stuck in the first level? Or maybe you just don't have anything beyond that?
--How do lock boxes work? I couldn't seem to open them, and when I destroyed them I didn't get anything as far as I could tell?
--I like that as you get more powerful, more enemies come, and they're different and more powerful
--I never engaged turret mode, not sure the purpose of it since i would feel like a sitting duck not able to move, but maybe i'm missing something
--I like the aesthetic, all of the ships and effects, backgrounds and asteroids look great. One thing that could be improved is the asteroid destruction. They just kind of disappear with minimal effects. Otherwise it looks great.
Not sure how much content you have since I got stuck on the first level, but even after I defeated the boss I kept playing since it's fun blowing up the ships. So you've got a great base to add content to, with different objectives and mission types, weapon types, and enemy types. Good work!