What do I need to run the app?

You'll need an Android tablet of size 7" or bigger running Android 3.0 (Honeycomb) or greater.

Can I run the app on my handset?

Not unless it has a screen size  of 7" or bigger - the interface takes too much space.

How do I close the app?

Just go to the main page and hit the back button, or select "Quit" from the menu.

I hit the back button before remembering I hadn't saved my design!! Will I lose it?

Nope. When you quit or hit the back button, the app saves off info to allow you to start right where you left off. Just start the app back up and select "Save" from the menu.