Spot the Difference Game
Warm up on three quick puzzles, then start the 20-level run against the AI.
The 20-level run
Levels 1 to 5 are 3×3 warm-ups. From level 6 the board jumps to 9×9 – eighty-one nearly identical cells – and the clock keeps getting shorter until the last levels give you under four seconds.
You have three chances. A wrong tap or a timeout costs one; when they are gone the run ends and your score goes on the leaderboard. Beat the AI to a level and it counts as a win in your streak.
What makes this spot the difference game different
- An opponent: Luna AI races you on every level and shows its time and confidence after each reveal.
- Fair start: you and the AI get the picture at the same instant and share the same clock.
- Short sessions: a full run takes about three minutes.
- Three runs a day per browser keep the leaderboard honest; the warm-up puzzles above are unlimited.
Frequently asked questions
How long is a run?
Twenty levels, usually two to four minutes depending on how fast you are and how many chances you keep.
Is there a leaderboard?
Yes. Finished runs are ranked by levels cleared, then by total time.
Can I play spot the difference against AI?
Yes. Every puzzle here is a race against Luna AI, our in-game simulated opponent. You both see the same pictures at the same moment and whoever finds the odd one first wins. It plays with human-like speed and still makes mistakes on the big grids.