I didn't experience the same problem, so I'm afraid that I can't help you out. I will tell you that the demo is short, very short, but it's a wild ride. I'm concerned about control issues of the second part of the demo, but hopefully I'll be proven wrong.
I'm not saying you aren't missing much, but I am saying that the demo isn't really enough to satiate a fix.... it's enough to tease you then leave you wondering.