use the arrow keys and explore the wonky physics. 1 and 2 for weapon 3 and 4 for hat 5 and 6 for portal gun (work in progress)9 and 0 to shoot click the blue npc to talk to him.
H O L D S P A C E W I T H V O L U M E A T M A X N I N E A N D Z E R O T O O
