How is the center calculated?

The game uses the geometric centroid — the average of all boundary coordinates, weighted by area. For a rectangle this is the intersection of diagonals; for polygons it's more complex.

Does shape size affect difficulty?

Larger shapes give you more room to be wrong in absolute pixels, but the percentage error stays similar. Difficulty mainly comes from shape irregularity, not size.

What score counts as "good"?

Under 10 px is excellent for regular shapes. Under 20 px on irregular polygons puts you in the top tier of players.

Can You Click Exactly in the Center?

Can you click the center of a shape on the first try? A shape appears on screen — circle, rectangle, or irregular polygon — and your job is to click exactly where you think its geometric center is. Your score is the pixel distance between your click and the true center. Most people land within 10–20 px on easy shapes, but irregular polygons expose just how miscalibrated your spatial instincts can be.

How to Play

A shape appears — study its boundaries before clicking.
Click once where you think the exact geometric center is.
The true center is revealed and your distance error is shown in pixels.
Harder modes use irregular, asymmetric polygons that fool your eye.

Why It's Hard

Your visual system estimates center by averaging the "weight" of surrounding edges — but irregular shapes have more edge on one side, pulling your perception off. Studies on centroid estimation show humans are systematically biased toward the larger mass, meaning you'll almost always miss toward the bigger half of an asymmetric shape.

Tips

1For regular shapes, imagine diagonal lines crossing corner-to-corner — their intersection is the center.
2For irregular shapes, mentally slice the shape into halves both vertically and horizontally, then find the intersection.
3Slow down on polygons with concave cutouts — your brain tends to ignore the "missing" area.

FAQ

How is the center calculated?: The game uses the geometric centroid — the average of all boundary coordinates, weighted by area. For a rectangle this is the intersection of diagonals; for polygons it's more complex.
Does shape size affect difficulty?: Larger shapes give you more room to be wrong in absolute pixels, but the percentage error stays similar. Difficulty mainly comes from shape irregularity, not size.
What score counts as "good"?: Under 10 px is excellent for regular shapes. Under 20 px on irregular polygons puts you in the top tier of players.

Built by

Ethan R. Caldwell

Game Developer · Wilmington, DE

Designed Can You Click Exactly in the Center? and 46 other browser puzzles. Game developer based in Wilmington, Delaware. Hardcore puzzle gamer at heart — obsessed with logic puzzles, sokoban-style mechanics, and physics-based brain teasers. Off the clock, unwinds with ARPGs, RPGs and JRPGs.

[email protected]