Small games. Clear challenges.

Measure your reflex speed across five rounds. React as fast as you can when the screen turns green.

Compare the populations of countries and economies across the world. Build the longest endless streak without a single mistake.

Challenge your geography knowledge across flags, capitals, and country silhouettes.

Measure your typing speed and accuracy with classic public domain literature passages.

Train your musical pitch, chord quality, and interval recognition with Web Audio synthesis.

Fill the celestial 4×4 grid so every row and column has one Sun, Moon, Star, and Comet.

Fight the Stroop interference effect. Name the ink colour or the word across 15 rapid rounds.

A pattern flashes for 1.2 seconds. Recall every tile to grow the grid from 3x3 up to 6x6.

Memorise number positions on the grid. Tap 1 to hide the tiles, then recall the ascending sequence.

Hit 30 targets as rapidly and accurately as possible. Test your hand-eye coordination and flick precision.