Jim Bonacci is the creator of Happy Wheels, the side-scrolling physics sandbox released in browsers in 2010 and coming to Steam on 21 September 2026 under his studio Fancy Force.

Happy Wheels is one of the few browser-era games whose community outlasted the platform that hosted it: the level editor and browser accumulated more than five million user-created levels, and that library, rather than the physics engine, is what the Steam release is built around.