Entity#update
Entity#game
Game#entities= sets each item's game
Entity#pressing?
revised Vyzer::Vyzer
Entity#state
revised Vyzer::Vyzer
extended Desktop#pressing? to accept multiple arguments
revised Vyzer::Vyzer
Entity#size implied value
Entity#control
Entity#right/#left/#top/#bottom
Entity#center
modified Vyzer::Character
Entity origin is bottom left
Entity#touching?
Entity#front/#back, revised #touching? and its specs
Entity#touching? docs
Entity#size is zero vector by default
extended Entity#touching? to accept class and return false on self