The gameplay isn't bad, but I wish a lot of the things were better communicated to the player. What's the story like? Why are we in the place? What am I to do with the magnet after I pick it up (figured that out during game, but it would still be nice to get like a prompt or something).
As Cademon said, the footstep sounds are annoying, they pop in your ear too much, as if you had broken earphones or something.
The alien /robot bugs out often and has trouble walking through gates, though I really enjoy the detail of lights turning on when it's near one.
I also noticed that you seemed to have shipped a debug version of the game. The print labels are visible, as well as the raycast you seem to be using for the magnet.