Thanks very much for the comment! Was it too confusing? Because I can put in the description how it works. Right makes you go up,and left make you go down and if you get to the end you restart down or up, like a loop.
Yeah, as I said, I thought the "next" level was the next level *down* rather than the next level *up*, so I was confused at first. It felt "backwards" until I changed the way I was thinking about it.