Simple and fun diversion.
Beating it takes <30 mins, but don't expect to win on your first try.
Difficulty is appropriate, but the shape of the player's hitbox leads to some unexpected deaths, particularly from elevators. It's not too bad, though.
My biggest gripe with the game, is that there is never any opportunity to admire your handiwork (dead female guards) and any of the sexy stuff, that you find behind the doors, is so small. Zooming in on doors, similar to how you are shown the photographs, would have been nice.
Download this for the solid gameplay, not the sexual content. Stick to the creator's Doom mods to still your sexually warped bloodlust.