📥 Quick Sort
Sorting / Reflex · Free online · No download · No sign-up
Quick Sort drops coloured balls from the top of the screen and asks you to route each one into the bin of its colour at the bottom. Tap the matching bin or swipe the ball toward it before it crashes into the floor. The drop speed rises, new colours appear, and the bin layout occasionally swaps, so memorising positions never quite works. Quick Sort is the cleanest test on the site of categorisation-under-pressure: a skill that powers everything from sorting mail to navigating a busy email inbox.
How to play Quick Sort
- Balls of different colours drop from the top of the play area.
- Tap the bin that matches each ball’s colour to route the ball there.
- A successful sort scores a point; a wrong sort or a missed ball costs a life.
- Drop speed increases as your score climbs; new colours and decoy patterns appear.
- Bin positions may swap mid-round — stay alert to layout changes.
- Three lives per session — chase the highest score.
Tips to beat your high score
- Pre-decide one beat ahead. While your finger taps the bin for ball A, your eyes should already be reading the colour of ball B.
- Anchor bins by position, not name. Treat each bin slot as a fixed location (“left bin = red”), not as a colour you re-read each time. Position retrieval is faster than colour matching.
- Recover quickly from swaps. When bins shuffle, the temptation is to keep using the old layout. Force a deliberate one-second re-scan immediately after a swap to override the old habit.
- Tap with rhythm at fast drop speeds. Rather than reacting individually, tap in beat with the drops. Predicting tempo is faster than reacting to each ball.
- Sacrifice harmless misses. If two balls are about to land simultaneously, save the one that costs more. A mis-sorted easy colour beats a panic miss on a complex one.
What this game trains your brain to do
Quick Sort trains rapid categorisation, the same skill at the heart of expert work in fields from radiology to airport security. The conscious experience is “I see a ball, I tap its colour bin,” but the neural reality is parallel: visual processing in the occipital cortex, category retrieval in the inferior temporal cortex, motor planning in the premotor cortex, and inhibition of non-matching responses by the prefrontal cortex — all running simultaneously for each ball.
Quick Sort also exercises multi-object tracking: monitoring several falling balls at once while planning sorts. Multi-object tracking has been shown to improve with deliberate practice and is correlated with attentional capacity — the number of independent things you can monitor before attention breaks down. Building this capacity transfers to real-world dense environments like driving in heavy traffic.
About Quick Sort
Quick Sort was designed to feel like a satisfying physical task with the pace of an arcade game. The dropping motion gives every action a clear sense of stakes and feedback, which is part of why it feels so engaging.
All CrizBrain games are free and run entirely in your browser. No account, no install. Your highest score is stored locally. Quick Sort is a strong choice for short, satisfying sessions — most runs last between 60 and 180 seconds.