Why do runners on an athletics track and horses on a horse track and dogs on a dog track run counter clock-wise ? is it so the spectator can see them closer moving left to right ? would it feel odd if they ran clockwise ? food for thought in fact, don't all grandstands sit on the finish line with left to right observation, maybe it's something to do with eye fatigue, would be a good test case of someone writing a basic shoot em up, that you can play both directions with a same level layout (mirrored maybe) to see how it affects average scoring etc. when drawing a square on a piece of paper do you start left to right ?