Is a modern shoe a vehicle? It provides a spring bounce assist to motion. If it is not a vehicle, then why would a pair of roller skates or even a bicycle be one? I answered that the roller skates were not a vehicle, and though it took some longer thought answered the same about the bicycle and wheelchair.
My state has unambiguously defined bicycles as vehicles, perhaps to avoid exactly this question. It also avoids the need to rewrite the vehicle code to specifically include bicycles. There have been exceptions added to the vehicle code to allow bikes to do things or go places where other vehicles are forbidden but there was no need to rewrite the vehicle code to specifically require them to stop at red lights. They are vehicles, so must stop.
In this game, in my state, bicycles would not be allowed unless the sign mentioned the law that allows them.
Mine was 70%.