No luck on a retry.
Link to gameplay: https://i.imgur.com/yNqlcg4.mp4
I'm using Google Chrome with Windows 11, with 64 GB RAM, it seems like the character has approximately the same jump height outside of the tutorial but can't totally tell. I do have hardware acceleration disabled in Chrome settings because it doesn't play nicely with my Intel GPU, blindly speculating, but it's possible that's a factor in the behavior I'm seeing.