Circles Reaction Brain Train

One shape doesn't match. Find it. Tap it. Before the timer runs out.

Circles is a fast, minimal reaction game about spotting the odd one out. Every
wave fills the screen with matching shapes, except one. The difference starts
obvious and gets razor thin, wave after wave, until you're separating colors
your eyes can barely tell apart.

HOW TO PLAY
- A pattern of shapes appears
- One of them is different
- Tap it before the timer empties
- Every correct tap makes the next wave harder

TWO WAYS TO PLAY
Endless. Keep going as long as your eyes and reflexes hold out. No finish
line, just your next best score.

Daily Challenge. 20 waves, identical for every player, every day. Clear them
all for a bonus and build your daily streak.

IT'S NEVER THE SAME TWICE
The odd one out isn't always a color. As you climb, waves start hiding it in
new ways:

- Color - the classic, and it gets brutally subtle
- Shape - one square hiding among circles
- Size - barely bigger, barely smaller
- Rotation - one tilted the wrong way
- Inverted - now tap the matching ones instead
- Pulse - everything breathing at once

Shapes arrange into rings, grids, spirals, arcs and scatters, then start
drifting, swaying and orbiting the deeper you go.

TRACK EVERYTHING
Best score, best wave, daily streak, longest streak, accuracy, fastest
reaction time, average reaction, total waves cleared and lifetime play time.

BUILT TO FEEL GOOD
- One-tap controls - you'll understand it in three seconds
- Clean, dark, minimal design
- 120 FPS support on devices that allow it
- Precise haptics that build with the tension
- No account, no sign-up, no internet needed to play
- A full round fits in under a minute

Train your reaction time, focus and visual perception in short bursts, or
chase one very long run.

Circles is free to play. An optional one-time Remove Ads purchase also grants
a free continue in every run.

How far can you see?