Error you will see when uploading to Google Play
"Your APK's package name must be in the following format "com.example.myapp". It may contain letters (a-z), numbers, and underscores (_). It must start with a lowercase character."
After you have signed and aligned your new app.
Awesome instructions on how to do that here.
Next you go to upload to Google Play but you get the above error.
I found a simple fix.
When you are compiling in cocoonJS make sure your bundle id is in lower case as well as application name.
Manage project> Edit configuration
I found simply changing the app name by renaming did not fix the error when I tried to upload to Google this approach did.