Wow, I'm impressed with the potential of this mechanic! At first I was skeptical about what the challenge was, but then y'all made the puzzle potential very clear once I reached the first level where choice mattered. Really liked the musical touch too!
My only feedback is on art consistency. I think each element individually looks incredibly nice (especially the background silhouette), but they have different styles. For example, the dwarves are lineless flat-color, but the wood has lines and the rocks have grainy texture.
In any case, it was fun!