Simple digital games stay popular because they’re easy to pick up and fit into...

https://fast-wiki.win/index.php/Why_Do_Puzzles_and_Quizzes_Stay_Popular_on_Phones%3F

Simple digital games stay popular because they’re easy to pick up and fit into quick breaks on your phone. With familiar rules and mechanics, like in puzzles or card games, you get just enough challenge without a steep learning curve