[SPACE]: Traverse through text [Left Click (Suburban Area Map)]: Open doors (if you go inside a house [Left Click (Level Select)]: Pick a map [T (City Streets Map)]: Go to the top of the building - what each difficulty means - EASY: a small little tsunami MEDIUM: Moderate sized tsunami. The normal difficulty. HARD (no hard levels yet): A HUGE TSUNAMI! (levels may also count on luck)