The latest update introduces a new stat on the upgrade screen: "Speed/Agility"
Upgrading this will improve your max speed, and acceleration. Have fun!
I've also been working on the possibility of getting some melee based player characters in the game - it's something I wanted in the release version but ran out of time. Any thoughts? Anything you'd like to see with melee combat?
Finally... if you're enjoying Dual Core, don't forget to tell your friends, and leave a review! It's hugely appreciated and helps get the game a little bit more visibility. Thanks so much!