Interesting concept! The cel-shaded visuals combined with the retro-style geometry make for a compelling look, and there seems to be a lot of core functionality here that I imagine you're taking forward to the full game.
I will say that it feels like it could use some tuning to the combat. Enemies can hit you from across the map, and it takes very few hits to take you down. Limited visibility ranges, damage direction indicators, and maybe a stronger crosshair that responds to aiming at enemies.
I'm interested to see what you build in the full game!