Paper Prototyping

The problems it help me in my game was that how I am going to get the sandstorm moving? So I drew a light shade in the middle of the paper to simulate the sandstorm. And my teacher ( -_- ) helped me and said I could make a layer then make it go back and forth. Other than that, that is the only problem. And I hope my game will come out to be what I imagine. ( most likely not )