Not bad!
<sarcasm> Now just finish this demo, add AI enemies, lap counter, game end, fix mentioned bugs...
For demo, this is not bad.</sarcasm>
Seriously, this actually looks like demo or alpha.
Fix : lap counter, best lap timer, reverse controls;
Add: main menu, instructions, game over (and different races), computer enemies, score counter, high score board -
And repost it. THEN I'll call it A GAME.
Ye get no stars, because I'm not rating this - this is not game.