Looks very professionally executed, well done! My only feedback, the name doesn't do it justice, "dumber". If you have plans to take it further, I would suggest coming up with a better branding that suits. I can easily see it sitting along CodePen or Glitch, especially if you can offer a more permanent hosting/deployment on those gists, it would be a very valuable tool for spinning up PoCs and various utilities for a team. Again, congrats on launching. It looks awesome.