Hide-and-seek is a children's game. One player shuts their eyes and counts. The others run off and hide. When the counting is done, that player looks for them. Families do not all finish the game the same way: sometimes the first person found becomes the next seeker, sometimes the last person found does. That small disagreement is part of how the game really lives, not a mistake. You can write the name with hyphens when you mean the game itself. Grown-ups sometimes stretch it: a person playing hide-and-seek with a question is dodging it, not crouching behind a sofa. That use is informal and a little teasing.