JavaScript Racing Game Prototype

I've just finished working on the first prototype for my up and coming racing engine written in JavaScript. It's nowhere near finished, but it gets the simple concept across of where this could be taken. Right now it's not a game at all, it's simply an engine which can be used to make a game. I wrote a basic one track map, with dumb AI cars and a player controlled car to show some of the functionality. Please excuse the bad graphics, I will be improving them later as the project develops.