Great game; congrats. Have you considered making the Gary/Pizza Girl story line interactive in some way? Maybe give two directions to go each time. You win the battle, you get to choose. You lose, it gets chosen for you?
I know branching is a requested feature, and that it's hopefully coming in future content - it's been mentioned by devs as something they'd like to do, if able. Doubt we'll see a change in the current campaign however.