The art is good, but it needs definitively more polish (vignette, bloom, gain -> overall post processing), then you could add a Background texture. A few particles -> light sparks, fog etc. A nice music track would be good, something Arcade like would fit in my opinion. In short you’ve to bring your game worlds a bit more to life. I can recommend this tutorial if you want to learn about this:

And here’s a devlog by Blackthornprod that tells you about the almost same:

It would be very nice if you can play and rate my game too!

Nice game. I would have preferred faster bullet movement for your own rockets, but the controls felt really responsive and the RMB boost felt very smooth. Good job. Check out and rate my game too if you get a chance.