played it for awhile and i think the intended route is pretty good though the turn after the second checkpoint is quite sharp but i found 2 other ways to get from checkpoint 1 to 2, skipping the jump to the wallride. 1st cut is easy to fix as right after i get checkpoint 1, i jump off the plaform to the grass before the small ramp and use the grey wall below checkpoint 2 to flip up. very easy to fix by just removing the block or just always build like 10 block high. 2nd is very hard to get (only have gotten this once). By going all the way to the left on the black blocks after checkpoint 1 and turning right at the perfect moment with enough speed, jumping off the most right side of the small ramp and landing on the square light grey block after checkpoint 2 then turning around to get the checkpoint and continuing as normal. Not sure if it actually is faster than your 29.9 but i will continue to grind it.
agree the turn could have been bigger and also made it possible with no brake or release, but i really liked the start because of all the reducing airtime tricks up to the jump. i feel like smooth curve ramps would have been better for the landing but not sure as would have meant more braking for the turn.