Actually on level 3 the platform you fall to was a platform type that prevents fall damage, that's probably why you could pass the level, you should've used it on all of the free falls too, if there is a bug that prevents you from dying after a fall, it is my fault and, I'd fix it if I'd know. About the stack counts, I think the problem is not the how many times it is added to the inventory, the numbers get updated a little late and that should be all the problem. Thanks a lot for comment, we plan to polish or remake the game after the jam. I'm glad you had fun