It was a reasonable choice in 2012 (and it is an adaptive layout).
iPhone is massively smaller and has a different layout (which is not really appropriate for the mini).
I would happily letterbox if I knew how! As a UIKit app (which uses constraints), the game cheerfully takes advantage of the width, and does layout based on top and bottom, which ends up overlapping elements.
It was a reasonable choice in 2012 (and it is an adaptive layout).
iPhone is massively smaller and has a different layout (which is not really appropriate for the mini).
I would happily letterbox if I knew how! As a UIKit app (which uses constraints), the game cheerfully takes advantage of the width, and does layout based on top and bottom, which ends up overlapping elements.