Thanks for checking my game out again! I can't put into words how much I love the drawing, I'm extremely tempted to print it out and put it on my noticeboard! Surprised you found that text - it's leftover from the old level designs, I've not deleted any of the props from it as it'll be easier to move them to new locations than completely recreate them.
As for the crashes, I was sort of half aware of the first one - the box was from when I was first learning how the physics works, so I've mostly been ignoring it with the intention of either getting rid of it, or reworking it into a more flexible system.
The second one is a little weirder - the old wall rolling system checked all objects in the level to see if they're close enough to attach to, while the new one only checks the ones immediately close to the player as a result of it being a bit slow (which you actually commented on a while back).
What's strange however is that it should only does this check when you've hit something, and the check isn't finding anything to attach to (which should impossible here). Are you sure you don't hit the ground the frame you hit the wall? It shouldn't be happening either way, but any extra details will help.