Here is our Getting Started guide: http://docs.coronalabs.com/guide/programming/index.html
There isn’t a guide for using Google Forms as far as I know. We have an API called “network.request()” that can make REST based HTTP based network calls, so you probably can get that to work at some level. I’m pretty sure someone posted something about connecting to a Google spreadsheet at some point in the past. But this will likely end up being a lot of work.
The network.* API’s also will support uploading and downloading local files to a web server of your choice, but you’re going to probably have to write some server-side script to handle the upload process. Since these files are stored on your server you would have visibility with them. But as a user of your game, I’m not sure I want my game save data somewhere where someone could edit it. This sounds fraught with security issues.
Both Google and Apple have “services”: – Google Play Game Services for Android, iCloud for iOS that lets you load and sync data with their cloud services. Most people would probably go this route to save game data, but you’re not going to be able to look at it off line.
Rob