Simple digital games like crosswords and card games stick around because...

https://felixsbrilliantjournals.evergrovio.com/posts/what-makes-a-simple-game-feel-polished-on-mobile

Simple digital games like crosswords and card games stick around because they’re easy to pick up anytime. You can dive in quickly without fuss, thanks to familiar rules that are easy to understand but offer real challenge as you get better