event registration

    i = @input_manager
    i.reg KeyDownEvent, K_SPACE do
      ship.warp vec2(rand(400)-100,rand(400)-100)
    end
    i.reg KeyDownEvent, K_LEFT do
      ship.moving_left = true
    end
    i.reg KeyDownEvent, K_RIGHT do
      ship.moving_right = true
    end
    i.reg KeyDownEvent, K_UP do
      ship.moving_forward = true
    end
    i.reg KeyDownEvent, K_DOWN do
      ship.moving_back = true
    end
    i.reg KeyUpEvent, K_LEFT do
      ship.moving_left = false
    end
    i.reg KeyUpEvent, K_RIGHT do
      ship.moving_right = false
    end
    i.reg KeyUpEvent, K_UP do
      ship.moving_forward = false
    end
    i.reg KeyUpEvent, K_DOWN do
      ship.moving_back = false
    end