I finished the game and I think there's a couple of things I didn't like, I looked at some of the other comments and I don't want to sound repetitive so I'll avoid the ones I've seen already discussed.
The enemies can be shot from way too far and if you shoot at them they just stay still, so the game is too easy and there's no real challenge.
Some parts of the level are broken, I don't know how to explain were it is properly, but from outside, in the desert you can just come in through a wall to the main hall where there's the door.
I found the music not really fitting and in general not that good.