Overall an accurate recreation of the original. The enemies seem to move in a nice way which prevents them from getting too far but are still constantly moving.
My biggest concern is that the game is very slow. If the game just ran faster I think a lot of things would feel better. Turning in particular seems slow and the game seems to take place on an infinite linear track instead of in a 3D space which is a little disappointing.
Other than the speed the game looks accurate to the original and the basic mechanics are all there.