You can purchase new parts for your bot to improve its stats. However, you can also purchase passive upgrades which remain in effect no matter what parts you have. Passive upgrades are more beneficial than new parts because of this feature. They begin at a relatively cheap starting price. Five categories can be upgraded, with each one improving a different stat. One improves your critical rate, two for your armor, and two for your power. The new moves you can buy make no real difference in damage and seem to be cosmetic.