Hey there!
This was an entertaining game. I loved the visual. It gives this sci-fi vibe, which goes well with the game concept. The music was chill. I think including a tutorial is a great idea.
This is an easily expandable game, so there are lot of directions you can go if you ever plan on working on this in the future. You can add more weapons and enemies. I saw other comments, and adding a multiplayer mode sounds like a great idea.
Overall, this was a fun game. Great job, and good luck for future dev work!