Hey, thanks for the comment! Two of these are known issues, yeah. The boss has an incorrectly set trigger, so an interaction doesn't fire. And warping to a certain position doesn't properly block movement, which can lead to the moonwalking glitch. I'll push a fixed version once the jam voting periods are over.
The cutesy background persisting is actually deliberate, but I can see how it could be misleading. I'll think about making a small visual change to it. Thanks for checking out the game!