Sad to hear you were bummed. If you check out my post mortem devlogs (linked on my main page) from some of my past games, I go into my thoughts about it and my own personal conflicts. There'll be a post mortem for this game too in a day or so and I'll probably discuss it more there.
I appreciate the video link. I'll take a look at it. I actually had different jump and gravity velocities. I had my brother test it and help me tweak the values. I was using a GDC talk about velocities, and a tutorial from Zenva that introduced me to the talk. The problem I'm encountering is that Godot has a gravity value it calculates in all three dimensions, and areas can be used to alter that gravity. Allowing all sorts of cool things. So I'm trying to muck with the physics problems until I get something I like.
In this case, the jumping was actually developed when I was making level 6 originally, and I honestly agree that the gravity still feels too slow. I really appreciate the link and you taking the time to play my game!