ooh thanks for playing! You are very right on all 3 accounts. I have yet to add more difficult sections after the player gets a few upgrades. The glide sound was a last minute patch just to have something, but the original sound designer is working on re doing all of it. And I was in the middle of trying a new mechanic for the seeds, where they unlock the more powerful ones, and forgot to remove the old UI.
Just curious about pacing, how long did you play it for?