Hi,
I mae newgrounds plugin alfa, i used this: http://www.newgrounds.com/projects/games/646548/preview
Download here: https://dl.dropboxusercontent.com/u/21297365/raiper34_newgrounds.c2addon
[b]How to add this to your HTML5 game:[/b]
1. Create a new Newgrounds Game Project
2. Download NG.min.js, the minified Javascript library: https://raw.github.com/ncase/NG.js/master/lib/NG.min.js
3. Put this at the end of your index.html page: <script src="NG.min.js"></script>
And in Construct:
1. Start API (it tooks usually sec, and plugin does not return anything, so you can wait)
2. Unlockmedal.
There is only 2 actions in this plugin, but if API on newgrounds will be updated, I update it too ;)