You won't be able to save in dropbox.
To save the game of your player you can either use webstorage
(be sure to check the How do I FAQ
at the section "Webstorage" or this tutorial
You can also use the save game feature through the behavior Persist
and this tutorial
explaining how to use this feature.
The save game is local to your user's computer.
For the scores and have the opportunity to share them, you need to save them on an online server. Once again, check the How do I FAQ, there are several topics on the subject in the "AJAX" section.
Have a search through the tutorials section as well, some tutorials already depicts how to do it.Kyatric2013-06-25 13:25:20