Racing game - very early work in progress

I am working on a racing game for Android. It is inspired from 70s Formula 1. Unfortunately I can't use the name Formula 1 and I'll need to make the cars different from the real ones as I don't own the Formula 1 licence. But my aim is a well playable, fun racing game with the feel of the good old Formula 1. As you can see I am making it in a cartoonish style, but actually I want to make the game mature in some aspects. So don't let the graphics fool you.