Honestly, it's not nearly as bad as all these reviews make it out to be.
I dig the 3-D world and the fact that you have to explore the areas to get to the terminals. However, I do find, much like others before me did, that the game experience is a little hollow, and it feels like an alpha build rather than a finished game.
Here are some suggestions to make this more interesting:
-Have the terminal unlocking procedure be more than just a click. Maybe include some kind of abstract puzzle that you need to solve, nothing too complicated. You could also have clues hidden through the stage on the walls and whatnot that would help unlock the terminals. Mix it up a little so we can actually feel smart while playing this.
-Add some hazards. It doesn't necessarily have to be monsters or enemy soldiers, but you could add something like fire fields, acid pools, or bottomless pits that you have to avoid flagging yourself through.
-Honestly, given the Doom-esque look of this game, it'd be nice if each stage had it's own music, instead of it all being the same. I can guarantee that you'll get more love from the players if you do this.
-If you can help it, make the controls more conventional. I'd like to have total freedom of movement, but otherwise, focus on the above things first.
I await your next offering with due anticipation.