wow that looks brilliant (from what I can see), do you think its at all useful to people that actually know javascript? or is it more of a tool for those that dont/are learning?
From the github page, the intention is that it's an introductory educational programming tool, that provides a concrete visual syntax that's easier for kids to get to grips with than the usual textual one.
It looks really useful as an add-on to a level editor for a game. Custom scripts that designers can create!