If you have five spare minutes, Pong Sharps will fill them. Everything happens on one screen with first to 7 goals, paddle at 20% of screen height, and the whole thing runs straight in the browser - no downloads, no sign-ups, no fuss.
Ball speed climbs on every paddle hit, and the return angle depends on where the ball meets the paddle, so control is about position, not timing alone. Spin from a moving paddle bends the return, and that is where rallies get mean.
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.
First to 7 goals wins. Play a friend or the CPU.
There are 7 close relatives of Pong Sharps in the catalogue, which is unusual here. Comparing it with Pong Tiny takes about a minute and tells you more than any description.
Difficulty sits at Hard and the player count at 2. Those two numbers decide more about whether you will enjoy it than the theme does.
The companion game to try afterwards is Pong Tiny: same family, different emphasis, and together they show what the Gaduh Shelf is actually good at.