I think there's a good chance that pressing the number keys above the letters (don't know what they're called ) will turn on/off layers. Just be careful with it; if you don't know what you're doing, you can screw things up quickly.

Don't bother deleting it and re-downloading it. Like Unne said, it's illegal just to have it. Nobody really cares though. It's your choice to make; personally I'm not going to go through the trouble of getting a SNES that works (my own stopped long ago) and then finding the cartridge. At least I'm not gipping the actual makers of the game.