The 2nd to last checkpoint is very problematic. While I'm aware of your video apologizing about it. I would like to give suggestions!
1. Please make the drop to the platform connected, or at the very least smaller in height. At least 70% of me and my friends death was from a bad drop onto the spiral.
2. The oval shape of the platform doesn't add anything to the challenge. It complicates the challenge to an extreme degree. Simplifying it to a circular shape would be much better.
3. Lastly there is no reason for the spiral to be individually disconnected parts with unnecessary drops. Making it one connected spiral would help keeping your player.
These changes are inspired to stop any player deaths caused from luck and not from player skill. Next time please playtest your levels before actually giving them out.
I truly hope for this game to suceed and I see the potential in this game. Please do well in your development journey.