Sour Brain Trail app icon

SOUR BRAIN TRAIL

Spot the colour. Tap it before it hides.

Download on the App Store How it Plays
Free to Play 36 Levels · 3 Worlds One-Tap Reflex Game
How to Play

One rule at a time, one thumb, total focus

The bar up top calls a colour. Find it in the swarm before it drifts out of reach — that's the whole game.

1

The Call

The bar names one colour. That's the only candy worth tapping right now.

2

The Tap

Candies bounce and knock into each other. Find the called colour and tap it before it drifts away.

3

Cages

Some candies sit behind bars. A caged candy can't be taken — tapping one costs precious time.

4

Shake

Shake your phone to rattle every cage open at once — and fling the whole swarm faster for a moment.

CHERRY
TANGERINE
LEMON
PEAR
SKY
PLUM
Why It's Sticky

Simple to learn. Brutal to master.

Every level is built so it's finishable — but the clock never gives you a second to relax.

Fresh Call Every Four

Every four candies bagged, the counter calls a new colour and the bar flashes. Stay alert or fall behind.

Shake to Free the Cages

Locked candies won't budge for a tap. Rattle the whole phone to spring every cage open at once.

Every Level Is Beatable

The clock is calculated from the candy count, the colours in play and the cages — nothing is unfair.

Three Stars, Three Skills

One star for clearing the shelf, one for time to spare, one for a run without a single wrong tap.

36 Hand-Tuned Levels

Twelve shelves apiece across three worlds, each one calibrated for a steady, always-finishable pace.

Track Every Streak

Best streaks, total bagged, shakes used — your whole candy-counting record kept right on your device.

Three Shelves

The trail gets sourer the deeper you go

Earn stars to unlock the next counter — each one faster, busier and less forgiving than the last.

Sweet Counter

Calm glass, few colours. Learn the eye.

Unlocked from level one

Sugar Rush

Everything moves faster and the cages arrive.

Unlocks at 16 stars

Night Shelf

Six colours, locked crates, no mercy.

Unlocks at 40 stars
Shelf Cleared

Chase all three stars on every shelf

Bag every candy on the shelf
Finish with time still on the clock
Run it clean — not a single wrong tap
Start Tapping — It's Free
Sour Brain Trail character art surrounded by candy, hearts and lollipops in a pastel purple palette
Shelf Cleared Time to Spare Clean Run Cage Rattled Streak Extended Shelf Cleared Time to Spare Clean Run Cage Rattled Streak Extended
Say Hi

Found a bug? Have a level idea?

Send a note and we'll get back to you.

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Or write to akuredapim816@gmail.com

Sour Brain Trail app icon

One finger. One thread. One shifting rule.

Free to play. Thirty-six shelves of sugar-fast reflex fun.

Download on the App Store