Hey, the lead programmer here! Our original plan was to allow the player to wall jump off the encroaching wall, but didn't have time to properly implement and bug test it. If we continue working on the project post-jam that's something I'd definitely like to implement, as well as improving the wall jump by making it its own state.
Also: the change with the frustration meter has to do with your physics. It starts subtle then ramps up. At frustration 100 you have ice physics, fall like a rock, have reduced air control, and have a quarter second delay between pressing jump and leaving the ground.