Fantastic game, but it froze after the first enemy fight in the cave when the timer appears. And apparently when it says it's autosaving it's lying because the only save I had was from the very beginning when it first mentions 'z' to save. . . Will return for the last badge because it was that fun but that was still pretty maddening.
ITR13 gave perfect distance advice. Max red both bars, aim for the top left of the screen on the way up, and when falling keep the wheels horizontal, don't even look at the ground. As long as the first bounce is good you should skate right in to 650-700