Make an html 5 game fully editable

Avg Bid (USD)
Project Budget (USD)
$30 - $250

Project Description:
I would like to make the following html5 game fully editable ( see the file in attachement).
Mainly your task would be to transform (or rewrite) the actual demonstratif.js (javascript file) in something that could be easyly editable.
It should look a bit like the file editing content in attachement.

Skills required:
CSS, HTML5, Javascript, jQuery / Prototype
Additional Files: editing+content.html
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