10 games with 5 free levels each. The full app has 30 games and 18,000 levels.
Flip cards and find every matching pair in as few moves as possible. Playable in the browser.
Tap the instant the target turns green and measure your reaction time in milliseconds. Playable in the browser.
Fill the missing number in the equation, inspired by the sangaku tablets of Edo-period temples. Playable in the browser.
Find the missing term in arithmetic, geometric and square-number sequences. Playable in the browser.
Timed mental arithmetic on a keypad: solve before the countdown runs out. Playable in the browser.
Face-down pairs in a growing grid: remember positions by quadrant. Playable in the browser.
Watch the colour sequence, then repeat it to stretch your sequential memory span. Playable in the browser.
Find the weight that levels both pans of the beam. Playable in the browser.
Tap letters to rebuild the hidden word from its scrambled tiles. Playable in the browser.
Spot the one katakana that looks different in a grid of near-identical characters. Playable in the browser.
Ippitsugaki: trace every edge of a figure in one unbroken stroke.
Sort coloured balls between tubes until each tube holds a single colour.
Rotate, reflect and recognise traditional Japanese patterns.
Fill 3x3 regions without leaving isolated cells.
Classic 9x9 constraint logic: every row, column and box holds 1 to 9.
Connect matching endpoints and fill every cell without crossing lines.
Equations fall from the top: solve them before they slip past.
Slide and merge tiles to reach 2048 with a corner strategy.
Move the tower disc by disc in the minimum 2^n - 1 moves.
Sort embroidered temari balls into bamboo tubes, one colour per tube.
Sort Japanese family crests onto lacquer stands, one crest per stand.
Place falling bricks to complete rows under pressure.
Rotate tiles until every path closes into a single loop.
Name the ink colour, not the word: the Stroop challenge.
Decide whether two 3D shapes are the same object rotated.
Swipe hanafuda cards into the right category against the clock.
Lightning card matching from the Ogura Hyakunin Isshu poems.
The addition crossword: fill runs of digits that sum to the clue.
Build bridges so every island is connected with the right count.
Carve one connected river between numbered white islands.