Quick games. Sharp minds.

Color Memory

A color flashes briefly — memorize it, then rebuild it with RGB sliders.

Sudoku

Fill the 9×9 grid so every row, column, and box contains digits 1–9. Unique puzzles every time.

Stroop Test

A color word appears in a mismatched ink color — tap the ink, not the word.

Pattern Recall

Watch cells light up in sequence — then tap them back in order. Each correct round adds one more.

ReactionFree

Reaction Grid

Tap highlighted cells before they vanish. How fast are your reflexes?

Number Memory

A number flashes briefly — memorize it, then type it back. How many digits can you hold?

Mental Math Sprint

Solve arithmetic problems as fast as you can. How many can you get right in 60 seconds?

Visual Memory

A grid pattern flashes briefly — memorize which cells were lit, then tap them back.

Nonogram

Fill the grid using row and column number clues to reveal a hidden pixel pattern.

Light Switch Puzzle

Toggle switches to turn all lights off. Flipping one switch flips its neighbors too.

Set Finder

Spot three cards that form a valid Set — each attribute must be all-same or all-different.

Dual N-Back

Track positions and letters simultaneously. Press when the current stimulus matches N steps ago.

Word Scramble Sprint

Unscramble words as fast as you can. How many can you solve before the clock runs out?

Trail Making

Connect the numbered (and lettered) targets in the correct order as fast as possible.

Mental Rotation

Identify which option shows the same shape as the reference — just rotated.

Sequence Completion

Spot the pattern and pick what comes next. Arithmetic, geometric, and trickier rules await.

Change Blindness

Two nearly-identical scenes flicker back and forth. Click the element that's changing.

Deductive Grid

Use the clues to place every item in the logic grid. Classic Einstein-style deduction.