Regarding the movement itself, I feel like that little bounce that happens after a high jump is a little unnatural. Because it has the same sound and graphics as an ordinary jump but is lower, it looks like some kind of input buffering bug. Giving it different audio and visuals would do, but personally I'd say with such high gravity it just would be better to ditch it overall and put in some kind of landing animation instead that wouldn't affect player's behavior.
From bugs, textboxes don't seem to pause the walking animation properly and timed textboxes don't react to mashing buttons properly - they just loop around until their staying period is up.
Looks good overall, I really liked the death animation