Straight to the point: Express Lane is 4 traffic lanes starting at 300 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.