I don't think it's that amazing. I whipped this up in about 5 minutes http://FantasticContraption.com/?designId=7837637
It only uses 16 wheels and that one uses over 30, (in fact there's one that only uses 4!). Mine is a champ and that one isn't, mine has a better tick count, a smaller mass and I'm just a child!
P.S. It has been design of the day for a lot longer than a day, when do we get a new one?