sorry, you can only use WASD keys on your key board to control Purple.
Sorry that it is a bit broken, sometimes you can faze through walls, but i did make that part of a level! actully i broke it, oops. a I got the moving part off a tutorial on youtube. https://www.youtube.com/watch?v=3K2FLdwpUEc when you paste that in the video will be the top scratch tutorial.