Nice
It's good. It's a game that I'd expect to see on lot's of other game homepages.
I think it's a little annoying how slow the character moves, but it doesn't bother me too much. You get used to it after a while.
I liked the gravity gun, although it was off of half life 2 to begin with, but whatever, it's cool.
So I've given it 8/10 - 1 point deducted for being a little slow, 1 point deducted for... *cough* couldn't finish *cough*.
Keep it up, you're a good game designer :)