The two stick figures live in a special kind of 2D world. This world is represented below in two different—yet equivalent—ways.

Instructions: to move a character, drag the cursor anywhere in the area.
Press w to switch character, s to reset positions, q to lock/unlock pointer*.
Press r to hide/reveal right part, l for the left part, g to reveal/hide the grids.

*: pointer lock works on Firefox and partially on Chrome