My only suggestion for improving it would be to change out the tires to something more racing style, black wall with no white lettering on them.
Give me about $1,100.00 and I will make you a Sponsor, and I will gladly do so. (said a little sarcastically)
Ta da! Check out "Frogman VS Batman" with a special appearance by my 2-day built Bender http://www.youtube.com/watch?v=z64KA0H1EUo and then the sequel "Frogman's Revenge" showcasing the Batmobile in its first video adventure! http://www.youtube.com/watch?v=-_FEGO-j9bA