I've been playing this game a fair bit now, and although I've yet to beat either of the final bosses it's been pretty fun. That being said, there are quite a few issues worth addressing too.
First of all, the performance issues and their effects on gameplay. While the game does look pretty impressive, I think the system requirements are still out of proportion. I'd expect an RX480 to be able to run the game smoothly at 1920x1200, but the framerate varies wildly (between 80 and 35 FPS or so) depending on where you're looking, and there are even bigger spikes occasionally. Normally I might be able to tolerate that, but the mouse smoothing seems to have issues with lower framerates; the slower the game runs, the more inertia the mouse seems to have, especially during spikes this translates into tiny flicks of the mouse resulting in huge turns. I ended up choosing a much smaller resolution to make sure that I absolutely never fall below 60FPS to keep aiming consistent.
Next, the visual design. I'm not sure what you're going for here, but most of the game looks something like a survival horror or such, but then there are things like the slimes and some weapons that look almost cartoony with their glowing bright colors, and the styles feel like they're clashing.
Finally, the gameplay. Unfortunately the combat falls a bit short in my opinion. The guns don't really have an impact on the enemies, who are generally slightly faster than you, resulting in fights that mostly consider of backpedaling while trying to shoot whichever enemy is closest, and running in circles with them once they inevitably catch up. There's no penalty for indefinitely holding sprint, and jumping is only useful for dodging very specific attacks designed to be countered by it, so I'm left wondering why those buttons are in the game in the first place. As for the boss fights, I'm not really a fan of these ranged attacks that have markers appearing on the ground; it might work well in 3rd person where you can see slightly behind you, but in 1st person perspective it's quite easy to accidentally back into an attack you didn't see and taking massive damage for that.
Anyway, that was a lot of complaining and ended up being more harsh than intended. Despite the issues (some of which are subjective anyway) the game does feel pretty polished already and is good fun for a while.