Color Count
Ignore the shapes. Count one colour. Then report your number.
Shapes blink in and out. Only one kind counts. How many did you see?
You're shown one shape in one colour — that combination is your target.
Shapes flash on and off. Count only the ones matching BOTH colour and shape.
Type your count at the end. Off by more than one and you lose a life.
Counting a feature combination forces you to check two things at once on every flash, which is far harder than tracking a single colour. It is a sustained attention task: one lapse and your running total is wrong, and unlike a puzzle you cannot go back and check.
Round 4 is solid and round 6 is exceptional. By then the shapes come twice as fast and most of them are near-misses.
A single feature can pop out on its own. A combination cannot — you have to inspect each item, and that costs attention you'd rather spend on keeping count.
Ignore the shapes. Count one colour. Then report your number.
Ignore the colours. Count one shape. Then report your number.
Memorize 1–9, then tap in order after the digits vanish.