I know a lot of time and effort went into this, but it's such a waste of potential in my opinion. The level design is way too linear, each level has one floor, you only have one weapon throughout the game, enemies come at you way too slowly, the difficulty is a joke, the gore is literally nonexistent, and honestly this did have far more potential than the developers put into it. It looks gorgeous and has a great soundtrack, but this was a very mediocre game in my opinion. If it wasn't built up so much I'd be much more forgiving, to be honest.
First of all, I don't think the engine this game runs on allows 2 floors. Second, the level design has to be linear because that makes it feel like Half-Life 2. Third, it wouldn't be easy to switch weapons, as he would have to code all the weapons, and then have hit sounds, and sprites, and so many other things it would be a nightmare. Fourth, I think the dev didn't want to make it gory so it could appeal to other audiences, and fifth, this game is a tiny little indie game dude. It's not a AAA release so stop complaining.