The controls are the left/right arrow keys, x to run and z to jump. (btw if you press space you'll slam down to the ground.)
So I decided around 2 and a half weeks ago that I was going to work on platforming scripts because I thought I sucked at making them. But apparently I'm just an idiot. So, now I've finished, and I've found a lot of bugs and have fixed them. The entire source code when put into Turbowarp is 9.35 kilobytes. EVERY TIME I FEEL LIKE I'M FINISHED I GO BACK AND UPDATE STUFF.