The two stick figures live in a special kind of 2D world.
Move the stick figures around in the plane, nothing really bad will happen unless you pass between the two poles.

(And don't hit a pole: this voids the Warranty)

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*.

*: pointer lock works on Firefox and partially on Chrome