I'm at the second pipe challenge thing. These are my least favorite part of this whole game, which I adore btw. One of the few RPG maker games I actually enjoy and don't feel like I'm playing an rm2k game with.
But yeah, the problem I've had that had to make me just close the game out was that second pipe challenge. The bug would get into the way of the switch to destroy the block and I couldn't get em out of it, because it's a long path. I could restart the timer but I still had to sit and wait. And restart. And restart. And since it just restarts your position and everything the bugs don't leave the pipe, making for a time wasting experience. If you could fix that for future release so that when you restart, the bugs do too, it'd be much more convenient. It wasn't a difficulty problem, it was just an annoyance. I'll try it again later but it sort of killed my vibe. :P