100 Meters Race is the classic button-mashing sprint: your runner accelerates as you alternate two keys, and the trick is rhythm rather than raw speed — an even alternation is faster than frantic mashing, which trips the runner up.
It's the format that goes back to Track & Field in the arcades, and it survives because the 100m is over in ten seconds and you always feel like the next attempt will be better.
Alternate the keys evenly rather than as fast as possible. The runner's speed comes from the consistency of the rhythm, and uneven presses actively slow you down.
Under eleven seconds is respectable and under ten is very good, which mirrors the real event closely enough to be satisfying.
Yes — a light keyboard game with nothing to install.