REACTRA

Something on your screen is about to change. Most people miss it. Reactra is a set of fast, strange visual experiments that test what your eyes catch — and what they don't. Every round takes seconds. Every result is a little humbling. You'll want to go again. CAN YOU CATCH IT? Spot the change before it's gone. Find the one that moved. Pick the real signal out of the noise. Don't fall for the fake-out. 20+ experiments, each one designed to trick your attention. YOUR CAMERA BECOMES THE GAME No controller. Just your hands. Reach the green zone and stay out of the red in Color Call. Switch sides as fast as you can in Side Switch. Freeze your hand dead still in Move & Hold. Memorize a pattern and reach it back in Sequence Reach. TRAIN YOUR EYES Go / No-Go: tap on green, hold on red, and don't bite. Peripheral Flash: catch what blinks at the edge without moving your eyes. Plus Reaction Arena,…