This game was developed for educational purposes for Bit By Bit (http://littlebitbybit.org/\). Worldwide high scores aren't available yet, but based on my personal experience of watching other people play, the current record is 429. Have fun!
so much lag i ran through at least 20 cars decent game but loads of lag fix it!!
@moles: Which browser are you using? It runs fine on my (Mac's) Google Chrome and Safari, as well as some Ubuntu and Windows (Chrome) I tried.