Spot the Shift

Trigger the flicker that swaps between two near-identical scenes, then click every shape that quietly changed — before your attention runs dry.

How to play

Each level shows a grid of shapes. Press Flicker to blank the screen and switch to the altered scene; a few cells have changed colour, shape or rotation across the blink. Click each changed cell to mark it. Finding them all clears the level and the next gets busier. A gaze budget drains while you study a scene, and exhausting it too many times ends the run.

• Flicker to reveal the change, then click every cell that shifted
• Correct finds score; wrong clicks set you back
• Clear all changes before your gaze budget empties

Controls

• Desktop: click Flicker to toggle scenes, then click the changed cells.
• Phone & tablet: tap Flicker and tap cells — touch supported.

Game modes

• Daily: one shared seeded ladder of levels
• Practice: fresh seeded levels to grind

Tips & strategy

• Flicker repeatedly and watch one quadrant at a time — change blindness hides differences in plain sight
• Rotations are the easiest to miss; check triangles and diamonds for a turned orientation
• Commit only when you're sure, since misclicks cost more than another flicker

What you'll learn

Spot the Shift is a spot-the-difference puzzle that weaponises the flicker effect, training visual attention against change blindness.

• Skills: visual attention, change detection, careful observation
• Best for: all ages
• For parents & teachers: trains careful looking and change detection.

About Spot the Shift

Spot the Shift is an original free browser spot-the-difference puzzle that weaponises the flicker effect from change-blindness research. Built in-house for PlayPendium.

A free, original browser game on PlayPendium — no download, no install. Browse all games →