There seems to be quite a lot of autorunners in this jam but I think this is the best take on it.
The presentation is very polished. The models are very simple but the lighting really brings out the charm. The UI probably got less attention then the graphics(and it shows) but it's not a problem for a jam game.
The main problem I'd say is that you are still doing the same things as a normal platformer. Perhaps have pickups that the player needs to get to for puzzles. You can make the runes pickups as well.
Overall, great job. Expand on this.