Right from the start not having a motion blur setting is extremely questionable. As quickly as I flick my mouse around it can cause issues of motion sickness.

Corridors are built too small, and the enemy projectiles track way too well. Sometimes I just take damage because I have nowhere to move to, but this isn't exactly built to be a cover shooter either so the option of dodging does not exist with how claustrophobic the environments feel.

Enemies also dropping explosions on death, or exploding as they get near is no fun as you're moving through the levels.

I do not know how much thought was put into how the enemies interact with one another, but I don't think they do at all. One of the things FPS games in this genre do a lot is set a foundation for how the player is supposed to interact with them, and that will generally set the experience for combat encounters.

From the start there are 3 enemies that shoot projectiles that don't do much to differentiate from one another. They all fill the same niche in combat and it's unclear exactly how one should really prioritize enemies in combat.

Weapons feel largely weak without especially when you require two shots with the 'Super Shotgun' for what I assume are the mid-range enemies. It feels like a lot of these ideas were put together sort of haphazardly. You have to balance out their power and drawbacks a little better.

The setting is interesting enough as are the enemy designs, but I can't tell what the design direction of the game is. If it's meant to be influenced by older classics then the arenas are far too small and the enemies don't pose enough of a varied threat.