Running is the part of my life with no interface, so I built one. The Groove puts you inside a record: hold to run, and every footfall cuts a mark into the floor ahead of you, then sweeps under before you can look at it. Speed spends breath, distance buys back the shimmer, and the canyon narrows the whole way in, exactly like the grooves on a record do. Sound on: everything you hear is the run itself, played back.

Canvas, Web Audio, no assets. The last eight notes lock into a loop that never ends on its own — the only way out is to stop running.