Mousetrap Car

Our mousetrap work very well when i first tried it at home but of course when it comes to test day our car was not working the same way. As you can see our vehicle is in need of some help. We need to make some changes in order to make our car go farther. Maybe getting it to go farther than 2 meters would be a good idea.
Our car was very effective at home but on test day it didn't really go far at all without a little push( pushing not allowed on test day). Our car didn't exactly go straight either but I think the reason for that was because the wheels were rubbing in spots.