Hi Heska,
I saw your private message about my game Yap, but unfortunately I'm not yet allowed to send private messages.
To answer your question: I have only one project for all resolutions on iOS (iPhone 4, iPhone 5, iPads) and Android. My project settings are:
- Window Size: 960x640
- Fullscreen in browser: Scale outer
- Fullscreen scaling: High quality.
Hope this helps.
Sylvain