tween usage in gamebox

demo_stage.rb

define_stage :demo do
  requires :tween_manager

  curtain_up do
    @player = spawn :player, x: 10, y:30
    tween = tween_manager.tween_properties @player, {x: 600, y:750}, 6_000, Tween::Sine::InOut
    # tweens can be canceled if need be, or they will clean themselves up when finished
    timer_manager.add_timer :foo, 3_000, false do
      tween.cancel!
    end
  end
end