Is Tic-Tac-Toe a good game? I know people who played it a lot at one time. Does it hold up?

If you had fun playing it, it was a good game.

Fruit Ninja? Doodle Jump? Angry Birds?

Games take a simple concept, possibly copied from elsewhere, possibly a mash up of others, possibly original ideas, and of it’s fun, it’s good.

Now was the hype over Flappy Bird strange and over the top? Probably. But remember fidget spinners? Yo-yos? Sometimes trends/fads happen.