Hi, thanks for the review/bug report! The move directions are entirely dynamic (abusing the physics system to detect movable/unmovable obstacles), so there's something weird going on around the top left corner, possibly one of the walls that triggers a collision for vertical movements when it shouldn't? Either way, as you said.. entries for the jam are closed, lessons were learned (and are still being learned, it seems). By the way, the BGM is from here: https://opengameart.org/content/time-to-puzzle-it-up