The script initializes camera in your app in order to show the app full screen on any mobile device of any aspect ratio and still providing the ability to test different aspect ratios on Windows. It always shows the intended Room as large as it can be on the display and fills screen sides by parts outside the room, see comments.
It is for one-window mobile games where one Room is the one Level (like the most simple games are), but may be adapted to show a part of the Room, I didn't try it.
The script has detailed comments. Free to use.
How to use: 1. Add the script to your project 2. Place in the first room in the Create event of the first object 3. Modify the script according to your intended resolution of the Room