It's really excellent. Usually when a theme stimulates a twisted mechanic like this it's novel but you wouldn't want to play it for long. There is something about the way that this works that makes me feel like a full and varied game could come from it. Like an action game with a one armed protagonist or something. It should be a horrible experience but actually it is the most interesting driving game I have played in a loooooong time. I think you should be very proud of what you have accomplished here. I hope you take this juicy nugget and run with it.