An excellent pamphlet game. The core move is an opposed roll where player and GM each roll 1d6 + 1 for each applicable Trait. There are no stats, though "Tough as Nails" or "Book-Smart" can be a Trait. PC traits can also be equipment, relationships with other  characters, etc.

Whoever wins the roll narrates the outcome. Ties mean compromise. Traits can be things on your character sheet, monster or environment descriptors, etc. In a fight, Traits also serve as your HP -- a crossed-out Trait cannot be invoked for a bonus to a roll until you rest and clear it.

There's a little bit more -- a PC who loses a roll gets a bennie, and in a nod to the inspirational material each PC gets a magical artefact that gives them advantage on applicable rolls -- but that's the gist. Simple enough for young children to grasp, but also suitable for rules-light OSR-ish/adventure game play with adults.

Also check out the expanded game if the pamphlet appeals to you. Same simple ruleset but with a lot more room for random tables, adventure seeds, GMing advice, and really lovely art. It's not on itch but is PDF and PoD at drivethrurpg.