This man who built this house was killed in a carriage accident. Supposedly, the devil riding the bicycle (you can see the enlargement of the figurine in the information to the left of the house) was placed there to commemorate the craftsman’s untimely death. The horseless carriage (lower right corner) was also put there for the same reasons.
I bought a calendar in the gift shop and it came with a tiny mini-calendar which causes most who see it to break out into various versions of “oh my goodness it’s so cute!!!” Myself included.