SHAPE MATCH · 15 TRIALS
Identify the target shape, then press its matching letter or tap the labeled button.
Complete exactly 15 trials. Wrong answers count and advance.
READY?
Keyboard: C for circle, S for square, T for triangle, D for diamond.
Keyboard: C / S / T / D · Touch or mouse: choose a labeled shape button.
HOW TO PLAY
Start the game and watch the large shape in the center.
Press C, S, T, or D for the matching shape, or tap its labeled button.
Finish all 15 standard trials, or protect a perfect streak against the shrinking endless timer.
VISUAL CHOICE REACTION
Each trial combines shape recognition, a four-way decision, and a quick response. Geometry, patterns, written labels, and keyboard shortcuts make every choice identifiable without relying on color.
This is a recreational browser game, not a clinical assessment. Screen latency, input method, attention, and practice can all affect your result.
READ YOUR RESULT
Standard accuracy uses all 15 trials, including mistakes. Average and best reaction times use correct answers only.
For a useful personal comparison, repeat the same mode on the same device and use the same input method.
QUESTIONS
Exactly 15. Every answer advances the game, so a wrong choice lowers accuracy but never adds an extra trial.
Use C for circle, S for square, T for triangle, and D for diamond. The same letters appear on the response buttons.
Every correct match extends your streak and presents another shape with a shorter deadline. One wrong choice or timeout ends the run.
Yes. The four large labeled response buttons work with touch, mouse, or assistive input, while the layout adapts to small screens.