Play any of the 13 perception tests on repeat. Difficulty rises each round.
Hold a button for exactly the right duration — no peeking.
Memorize a color for one second, then find it in a 2D palette.
Shapes flash briefly — remember where each one was.
Find the centroid of an irregular polygon.
Bars flash for less than a second — estimate their average height.
Overcome the Müller-Lyer illusion to make two lines equal.
Watch a dot move, then reproduce its exact speed.
Predict the mirror reflection of a point across a diagonal axis.
Resize a square (or triangle) to match a circle's area.
See a short arc — find the hidden circle's center.
Locate a target shade on a gradient strip.
Click the instant the panel turns pink. Don't guess early.
Dots flash for under a second — estimate how many.