Good job considering the time limit. Yet still, I think such a game as this requires really good movements for being enjoyable for more than a couple of minutes. Which is not really possible to make in 3 days, I guess. Especially making it in first person view must be a tough job indeed. So I run and jump around some and started to feel dizzy. I am a bit light headed usually, so it can also be something about me.
I liked the level design btw, made me wish I had a grappling gun. :D Bravo!