Very interesting game! I really enjoyed the retro art style and music, it created a nice vibe in the game. When I got to the rocket I ended up getting stuck in a corner and even if I tried to turn it (the rocket was lying on one side) I couldn't and even when the rocket's health hit 0 nothing happened. Other than that I did enjoy it and I like how after you hit the enemies once they attacked you, keep up the good work :D
I don't know if you've heard of Game Development World Championship before (gdwc2019) but it's a competition for indie game developers where they can submit their games and it's free! It's great if you want some more visibility for the game and it only takes a couple of minutes to join :)