I tested it on my laptop which has a gtx 560M card, and it ran fine. i also left a few comments in your journal.
It works !!! and I like it I got stuck at "Pickup and Drop With V Throw With C", this should be the end of the demo or I'm doing something wrong ?
*10 minutes later and an epiphany* Wait, I figured it out, awesome .
Awesome!
@AngeReveur: Should I make it more clear that you can pick up the bone piles? Also your game is working fine on my laptop, I did find a bug though. When jumping over the spike pits it's possible to clip into the wall and keep walking while the protagonist is halfway below the floor.