Easy, medium and hard: what actually changes between our difficulty levels

The five levers behind every tier

Difficulty is not one number. Each tier sets the count of differences, how large the changed areas are, how much contrast each change has, how many objects fill the scene, and the target time you need to beat for three stars. Change one lever and the puzzle feels different; change all five and you have a distinct tier.

Easy

Three to four differences, large changed areas, high contrast, an uncluttered scene and a generous target time. Easy puzzles are not simplified versions of hard ones — they are built to teach. The changes are distributed evenly so a band scan finds them in order, and change types skew towards removed and added objects, the two types that counting catches.

A player using no method at all will still finish an easy puzzle. That is the point: it should end in a win, because the win is what makes someone try the next tier.

Medium

Four to five differences, moderate zone sizes, more objects in the frame, and target times that assume you are scanning rather than wandering. This is where repetition enters: matching windows, paired vehicles, clusters of animals. Counting still works, but you have to actually count instead of glancing.

Medium is where most players settle, and it is the right place to stay if you want puzzles that take a minute and end in satisfaction rather than relief.

Hard

Five to six differences, smaller and quieter changes, dense or deliberately sparse scenes, and a target time that only rewards an efficient route. Change types shift towards moved and resized objects, which no counting strategy detects. Hints stop being optional for most players, and three stars becomes a real result rather than a default.

Importantly, the fairness floor does not move between tiers. Hard puzzles have the same minimum zone size, spacing and contrast as easy ones. They are harder because of structure, not because the rules relaxed.

Why the target time changes with the difference count

The target scales with how many differences a scene holds, plus a fixed allowance for the first look at the image. Two extra differences add real search time, so a flat target across all puzzles would make busy scenes unachievable and sparse ones trivial. Scaling keeps three stars roughly as difficult everywhere, which is what makes stars meaningful as a personal benchmark.

How to move up a tier

The reliable signal is hint usage. If you are clearing a tier without hints and beating target times, you are no longer learning anything there. Move up until you need a hint on roughly one puzzle in three — that is the zone where visual search actually improves.

Practically: clear Forest Warm-Up, then Reef Patrol, then Rush Hour. If Rush Hour's window grids stop bothering you, Sugar Rush and Barnyard Mix-Up are next, and Desert Mirage is the ceiling.

• No hints, beating target times: move up a tier.
• Hints on one puzzle in three: stay where you are, this is the learning zone.
• Hints on nearly every puzzle: drop back one tier for a week.

Finding puzzles by tier

The All puzzles page groups everything published on the site by tier, across drawn scenes, hidden object levels and photo puzzles, newest first. It is the fastest way to find something at exactly the level you want rather than working through a pack in order.