Thanks for the feedback and I'm happy you're enjoying the game!
That was definitely an oversight on my part, thanks for pointing it out. I'll fix it later, but right now I have no access to my computer (corrupted HD, I'm working to fix it, but it'll take a while).
Until I release an official fix, here's the cheap way: let the Hagurumon alive and jump to that platform right before the gears. Then get hit by Hagurumon's attack and, while you're flashing, jump on the gears while you're invincible and then the next platform. Be fast and you're good.
Thanks again!