Very well done with the sprite work, one of the best looking games on here by far. Also good job reflecting on where you ran out of time!
As for feedback that hasn't been mentioned, adding some parallax to the background would push the visuals even more, and being able to vary the jump height based on holding the button would be a nice touch too. Varied height would also probably help with selecting multiple paths if you ever do come back to the game as well!