What puzzle and games do you like?

I'm interested in keeping my mind active and have started playing puzzles on android and ios for entertainment and for the challenge.

I love the logic game "The Sequence" [1]

I play some solitaire and jig saw puzzle games but have not yet found the designs that I like.

So help this aging IT worker (62 years old) keep his brain fresh. What do puzzles and games do you enjoy the most?

[1] https://play.google.com/store/apps/details?id=com.onemanband.thesequence&hl=en