I'm not an authority on OSR-ness, but my submission to YourMoveJam is inspired by my experience with OSR (and adjacent) stuff: Ghost Orbit.
It's a game about things breaking in space. It uses the basic chassis of PbtA: 2D6 summed to get gradated results. But instead of anything modifying the roll, everything is HP. It makes for a game that's always very clear about what's at risk.
It's on sale for $1 for the remainder of YourMoveJam.