Thank you goldencut for reporting the issue and then following up by testing with a fresh SolitaireCG installation and confirming that the problem is now gone.
Bug Closed.
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Is Android locked in portrait mode on your device?
On my Android 4.4.4, this setting can be found at:
Settings -> Display -> Auto-rotate screen
My setting is enabled and permits SolitaireCG and other apps to rotate when the screen is rotated.
Sorry for delay, it isn't - all other apps rotate, just SCG won't. I'll reinstall and try once more.
Okay, clean install seems to have fixed that. Closed.
Thank you goldencut for reporting the issue and then following up by testing with a fresh SolitaireCG installation and confirming that the problem is now gone.
Bug Closed.