Meh
I agree with some others that it feels generic. Not enough done to make it your own.
And the one thing I can't get over is why the camera is rising on its own. Is the tower sinking? Do I have a time limit? The impression I was getting from the opening was that I just need to get to the top, none of this evil race against the clock stuff.
And in response to the review below mine: You realize that a) This is by the author of Quick Sand, and b) This came out in 2009, well before he made Quick Sand, right?