A nice little game, but I do think that there's some re-balancing that can make this game juuust right.
I did want to report a bug, in the first section that looked like an upward tunnel (I added a screenshot). I bumped into the ladder, which jostled the vertical pillar and the horizontal platform, and made the horizontal platform not intractable (so I couldn't proceed forward since I could not get on the platform).
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Thanks for your comment. We really didn't expect the game to be so difficult. The game take itself 8 minutes so we didn't make checkpoints. Maybe it was a mistake.
We know about your bug and we haven't been able to fix it in a good way so we just place a secret passage at the bottom of that tunnel.
You can see that at game playthrough on game page.