Mat Hoffman's Pro BMX is currently only 40% complete, but due to its reliance on the rock-solid Tony Hawk engine, it's already a whole lot of fun.
The list of features for Pro BMX looks a whole lot like the list of features for Tony Hawk 2. You've got your real freestyle bikers, eight different levels, and multiple tasks (such as collecting letters and getting a certain number of points) in each level. The game also has the same type of level creation seen in Tony Hawk 2.
The game is a little bit more complex than Hawk, but the game is just as easy to pick up and play, provided you're already familiar with the control scheme. You've got your grab tricks and grinds, as well as a few more complex tricks, like backflips. The game also has the same graphical style as Tony Hawk 2 - the bikers looks a lot like their real-life counterparts, and the trick animations are pretty fluid.
Sure, the game isn't finished yet, but I think it's a pretty safe bet to say that if you liked Tony Hawk, you're also going to like Mat Hoffman's game, as well.