I must be a complete noob because I got stuck at the very beginning. I had a key but I couldn't open the door that was locked or the vent. I really liked the vibe of the game though.
One thing I would say is that you could make the movement a little bit nicer by having the player move at intervals when the arrow keys a pressed down. This would keep the turn-based movement while not having to press forward 5 times to walk 5 steps.