The main purpose of this template is to include the player's car controller and car AI to mimic the physics of games like micromachines so you don't have to code those from scratch. Anyway, nothing stops you to add those game mechanics. Half of the job is already done!
Could you consider adding the dodge roll into your 2d shooter template that I purchased? I asked for this awhile ago and would appreciate the after-market support on that feature. Cheers!