It looks like this may be your first game project, if so congrats on finishing! This is a great functional top down shooter that I think you should continue to polish, and I really like how cool the space ships look. I'd suggest first to look into some feedback on both the player and enemy taking damage. Flashing a color, a sound, maybe some camera shake on the player taking damage. Adding more feedback and juice is a great way to make a game more fun!
Excellent job!