Hold & drag the shield Click and hold anywhere in the arena. The shield follows your cursor and spins as you move — left/right rotates it, up/down tilts it.

Push to the right or top edge While dragging, push toward the right or top edge of the arena. The background will travel forward in time — from dinosaurs to cyberpunk.

Push to the left or bottom edge While dragging, push toward the left or bottom edge to go back in time. All the way back to the Jurassic, if you dare.

Release to float Let go of the mouse and the shield floats gently back to centre, hovering over whichever era you left it in. Very dignified.