Check out today's Google Doodle, in honor of Gerald Lawson and featuring a bunch of games that you can play, edit, and even build your own:
https://www.google.com/doodles/gerald-jerry-lawsons-82nd-birthdayI don't have time to try out many of these games today, so I'll definitely come back to this link later to try them all.
Edit: Apparently, once you start playing from that link, you'll want to go back to the main menu and go to settings to find the tutorial, if this is your first time checking out this collection of games and its built-in editor.