I'd love a way to refuse or undo level ups. I had the earth sword (the heavy one that deals extra damage for being high up), and I had it resting on an empty slot at the top of my backpack. I got the final levelup just before the last boss, and it made the sword drop to the bottom of my backpack and deal almost 0 damage. Before, it was dealing something like 42. I lost to the final boss because I leveled up, which doesn't seem intended.