WASD to move. In the beginning, click the screen to change your character's look. Then press space to confirm your choice.
Some of the platformer script is not by me. I wish I could give credit to whoever made it but I don't know where the script comes from. It's in so many games that I can't figure out who came up with it originally. A special thanks to @tessm for the title! v.1.1 standard demo, 11 levels, 4 characters v.1.2 bigger demo, 12 levels, 6 characters v.1.3 added title, added the blue blocks that hides you, 15 levels, 6 characters