From the introduction:
keymaster is fundamentally a game about acting creatively on those moments when you’re in an inspiring place and want to do, become, or portray something just as awesome.
keymaster is designed to be playable as a spontaneous activity while going about life. it can also be arranged as an explicit social activity, especially with the advance prep extension.
play while hiking, traveling, strolling, waiting, vacationing, visiting a cool building. or, use the abstract key extension to play anywhere, like on a plane or bus, in a restaurant, or at home.
The PDF document includes two URL references to online videos that serve as "inspiration".