Hello 1UPStudios/Nelson,
There is no clear answer since it really depends a lot on your game. When you have a puzzle game with physics and fixed proportional tiles it is different than an autoscaling RPG.
Even between genres there is no clear answer since you could have a preference over one scaling method over the other.
In the end it boils down to "TESTING".
(It took me about a month to tweak Stencyl to work on my +8 mobile devices, but a large part was how to create certificates and Stencyl in general)
For platformer/rpg kind of game I use:
- Create new Game with 320x480 landscape/portrait
- 200 tiles width+height for a great canvas
- Settings - > Advanced -> Antialiasing = off
- Settings -> Web / Desktop -> Scale : 4x, Max Scale 4 , Scale to Fit (Fill) (x full Screen)
- Settings -> Mobile -> Display -> Scale Mode : Scale to Fit (Fill) [leave maximum scale to 4x]
- Make graphics based on 128x128 TileSet (4x32)
- Import graphics at 4x mode
I use 320x480 since I want most of my games to run on my iPhone 3. The create-game phase you select the MINIMUM resolution you want your game to run with.
If you have an Apple Developers account you might be able to device-test your game but you would need several devices to really test it all. If you don't have all devices but you have friends who do, you need a Stencyl Studio license to publish a file that they can download. But it could be cheaper to just invite them over.
You must have OSX to publish/test ios (and you can use mac to publish android).
Hope this is a little bit helpful.
Best regards from
M.E.