UPDATE: As I'm not sure how Scratch 3.0 works yet, I'm unable to fix the platformer right now. For a while, this will be unplayable :( But thanks to @MarioANDBowser telling me. I'll continue working on it! Sorry for the inconvenience. 1/6/19 Just use arrow keys, and, heck, do what it tells you. Some of you have been commenting on how to do levels, and all I can tell you is that this is a game. You're supposed to figure it out. That's what makes it so fun. And stressful. And annoying. But hey, better one person than two to be annoyed, right? So please do not annoy me anymore.