Yes, on our last Jam we had the same problem and people did not even clear 10% of the game (we went a bit hard on it, it required around 2 - 3h to finish lol) and got frustrated about it, so we decided to make more simple game for jam (and we still need to work about it).
Thank you ! Not really, we just fixed some bugs and made the end easier to find in a last build but that's about it ahah, we will move to the next jam (or next project ??)