Straight to the point: Traffic Jam 66 is 4 traffic lanes starting at 280 px/s, playable in your browser right now. It is tuned for quick runs, honest difficulty, and controls that make sense the first time you touch them.
Traffic scrolls down 4 lanes and never stops; you weave between cars, and the closer the pass, the bigger the near-miss bonus. Coins appear in risky places - exactly where you would rather not be - and the speed climbs the whole time.
Nothing here needs a tutorial or a wiki. Controls are one gesture, the goal is one sentence, and the difficulty comes from execution rather than homework. That is exactly what a browser game should be.
Weave through 4 lanes of traffic and grab coins.
Read Traffic Jam 66 as a Pecut Shelf game first and a Pecut Shelf game second. The shape explains how the session will end; the group explains what it will ask of you before that.
It is rated 4.4 out of five in our notes, and the number is held up mostly by how quickly it can be restarted rather than by how clever it is.
The companion game to try afterwards is Speed Demon: same family, different emphasis, and together they show what the Pecut Shelf is actually good at.