http://www.scirra.com/arcade/example/1460/save-load-engine-for-platform-games
There a .capx is uploaded on this arcade, but please notice "Delete Data & Restart" doesn't work, it seems it's blocked on Scirra Arcade.
Also you can try it
http://dl.dropbox.com/u/76227787/SaveLoadEngine/index.html
It comes autoload when you close browser and re-open browser again.
I hope you like this example!
Develop games in your browser. Powerful, performant & highly capable.
great job! but i can't open the capx :\\</p>