When designing the graphics of the game (e.g. for iPhone): What is the resolution I should base it upon? Is it the smaller resolution (iPhone4 screen resolution) so that I could scale it bigger to bigger resolution devices later on or the bigger resolution (iPhone6+) so that I could scale it smaller for smaller resolution devices later on? Which solution would be the best to implement that will not distort the graphics?
I am creating a game now (endless runner type game) and I am using parallax backgrounds. What will be the best option in supporting multiple resolutions? Scale it so that it will look the same on every device but it might distort the image or reduces the viewing area of the game when scaled. Alternatively let the other parts of the background be seen on larger resolution devices making the graphics stay as it is but let users using larger resolution devices see objects that might not be seen on smaller devices. I am talking about the next part of the parallax background.
My question pertains to iPhone devices (iPhone 4/4s, iPhone 5, iPhone 5s, iPhone 5c, iPhone 6, iPhone 6 Plus) for now.