Awesome game! Parts of it were polished extremely well like the gun and camera movement! I want to stress that I think this game has a a boatload of potential, it just needs a bit more time.
Here are some of my recommendations: Other spots like the lack of hit feedback really reduced the dopamine rush the game could have given me.
Also the bullets are really hard to predict and prevented me from seeing a lot of the enemies.
Out of curiosity, did you use a particle system to spawn your bullets?