If you have five spare minutes, Kitty Pounce will fill them. Everything happens on one screen with a 45-second round with 8% bomb rate, and the whole thing runs straight in the browser - no downloads, no sign-ups, no fuss.
Streaks matter: consecutive hits build a multiplier, and a bomb resets it to zero. Greedy players chase every popup and pay for it; smart ones let a bomb pop unharmed and keep the streak alive for the gold targets.
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.