A very quick mockup for an iPhone math application that I banged out in a ciuple of hours. The ships on top are attacking the city below, with each ship’s chape correspnding to a specific trait. Green was a normal ship, red is sleeker, hence faster , and yellow is slower and more ponderous but took two hits to finish off. The city has 3 layers of shields, which correspond to “lives”, which I thought made more sense than just having a life bar or three hearts on top of the screen. Ultimately this design was discarded, but I thought it was nice enough to put up here.