The direction given to me was “mini-metal’ (think Southpark) and the muppets metal band. The age demographic being males 14-50.
From the start, the app was intended to be a game. With the little monsters concert theme, I really wanted to create an environment and make the graphics fun and engaging in the way that Plants vs Zombies was when I played it. We had a crazy, crazy schedule, and all the graphics work, including the app icon, were done in about a month. This has, so far, been the most graphic intensive app I've done.