I love vehicle games like this. It has a tense atmosphere, that "strongly suggest" you to move slowly and carefully. Had there be an additional time limit, the game might be even more tense, but could be a little stressful for some. As it stands, it seems like an interesting game to speedrun.
One nitpick, I personally never liked those "pigeonhole" flashlights, despite the fact that they add a bit to the atmosphere. I'd still have a weak outer cone around the lit area, that doesn't go as far as the main beam goes, to at least lessen the harsh contrast between lit and unlit areas; especially when we're walking on the ship (Plus it is far more natural. I got a strong diving flashlight that is a really good example)... It would add even more to the atmosphere of the ship, as it is your only "safe haven" out there. ;)
Great game to play, really enjoyed it.