I don't know if this is a rage game, or I'm just really unlucky, but I eventually got to the good ending. Skip to 39:30 if you're just here for the ending. 24:52 if you just want to see me lose my mind. The rest is really emotional.
The glitch I encountered most often was my jump tokens not refilling, which seems to happen if I hit the corner of a platform. It stranded and killed me quite a few times. The other big one (at 24:52) was just such bad luck that I thought it was on purpose, but I got struck by lightning while carrying a worm, and it broke the worm, preventing me from finishing the game.