Great concept
Good fun. Enjoyable and fun to think about. Here's my two issues:
-The walking on metal effect was enough to make me rip my eyeballs out. Quiet the effect or get a different one. You better change this soon to help your rating for first day.
-I would suggest making a mini-map possibly. May be not showing the whole level but kinda just the surrounding bit of terrain. The redundancy of the graphics can make the memory issue slightly overwhelming.
Other than that, good job on the scripting concept.