I love the graphics. No big fan of pixel art in general, but yours is really good. Also the color palette is welll chosen. Only the lightning looks wrong in that sense. Think an algorithm for drawing it in a pixel style from start point to an end point with some branching on the way shouldn't be that hard. If you are looking for the extra challenge, search for L-systems ;-)
Just rated this other game and praised it's jump mechanic - maybe it helps you to find the issue that lets your mechanic break: https://itch.io/jam/wowie-jam-4/rate/1659611
All-in-all: Good game!