Ruleset creator - design feedback wanted

I’ve created a “mockup”:/tmp/create_rules.html of the main page of the rulecreator front-end. Please give me any feedback you can. This is a “concept” mockup - the tables shouldn’t be present in the final version.

If you can write/help with the necessary javascript then please do volunteer - I don’t know any javascript, so it’s going to be a slow project/steep learning curve if I have to write it all!

I’d very much like this to be a community effort - there are far more talented people than myself out there, and so the finished creation will be much better with your help.