I'm pretty sure this is the best I'm going to manage.
Fun idea! I did find the game was a bit laggy when play first began, on subsequent attempts it became smoother, probably a browser issue. I would have tried a downloadable version if there was one to see if that gave a more reactive experience. I found sprinting was a trap, in that it almost always gave me too much momentum to land safely. I S Ranked the second level every single time, the other two seem to be much more stringent in their demands.