Increased targetSdkVersion to API level 26.
Update 1.5:
Orientation locked if device is turned.
Orientation can be unlocked via menu.
Update
You want only a quick game and you have
to much cards on your screen?
Now you can change the size of the cards.
If you want less cards on the screen make them larger.
So there will be less cards and a faster success for you.
On Smartphones click "Menu" for menu.
On Tablets click on the top right corner for menu.
There you can shrink/enlarge cards in 5 pixel steps.