Straight to the point: Frog Fever is a 60-second round with 13% bomb rate, 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.
Targets pop up for a fraction of a second and vanish; hit the good ones, skip the bombs. Miss a target or tap a bomb and you lose one of three lives. The a 60-second round with 13% bomb rate, so the difficulty is front-loaded into reflexes rather than memory.
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.