Arrow keys to move. This is just an example of how to create a trail. It's not the type which comes out of your back, e.g. you leave a rainbow behind you, it comes out of your feet when you walk. So you can make a dust/grass effect. You can backpack the custom block "trail sprite: () ..." and add it to your project, credit would make me happy! UPDATE: Added grass so it looks more realistic, and made backdrop a little (a lot :p) less solid so you can see the trail more clearly.
