I totally get it... towards the end of this jam's development time I actually thought about making parts of my game harder, because they just felt boring to me. If I ever participate in a speed jam again I will make sure to have multiple levels with increasing difficulty. I think if there's at least one level where player's to be able to get onto a leaderboard it makes it way more likely for them to stick around and play more.
E.g. I was very close to giving up on the last jump of your game as well. I think I had to put in close to 20 minutes, which tbh most people simply won't, especially not if they don't feel like making progress. Most players probably won't even try on the same level for 2 minutes, let alone 20 :D I'm sure it's very similar for my game, so this was a big learning for me.