Beat it with more than an hour's worth of attempts, following Ace's guide in the main comments. I can't reliably execute those on-the-spot backflips you're doing in the video. I'm not certain if it's a skill issue or the fact I'm on mouse and keyboard, but even two quick taps of w-s would drop me off the platform and half the time I wouldn't even be fast enough to do the slide animation. Also, were the backflips in the tutorial? I had to look at the scroll to figure out what exactly was happening in the guide video.
Another couple bits of feedback- consider making your partners intangible in the time trials. The worst losses were when Leaf would bump me off a small platform- it would usually only happen when I was already losing, but it felt unavoidable and bad. Even if I was just a little slower he could kick me down three jumps and make the whole thing unwinnable. Which leads into suggestion 2- could you put a restart button somewhere in a menu when you're racing? I was going in and out of buildings to reset whenever I f'd up because it was faster than waiting the race out, but I could've saved like 5-7 minutes over all my attempts with a quick reset button.
Thanks again for the game, and the guide.