I also had that idea already. The problem is, that you can write a bot, that drives for you.
everything a human can do can be botted, except something creative, but that probably can not be done by all people otherwise...
good thing is, that at the beginning it doesn't make sense to write a bot, because it costs a lot of time.
But if the coin growed, you have a lot of cheaters...
nevermind, the community can grow bigger and help with the development of the game. It could be 3D in the future, for example. I'm starting to like these concepts. Instead of waiting for some games to adpot crypto currencies, let's integrate them into the game from the very beginning, make the game fun to play and the word will spread among people who like playing games (a lot of them).