National Casino

National Casino is a game of the eye. A grid of tiles, all the same colour, and one of them a shade off. Find it, tap it, and the next board is already waiting.

The first levels are kind: four big tiles and a difference you cannot miss. By the tenth there are thirty-five tiles and the odd one sits seven percent away from its neighbours — close enough that you feel it before you see it.

Nothing is random about the puzzle you get. Every board is built from the level number, so a level you failed is the same level when you come back to it, and beating your own score is a fair fight.

Miss and you lose a try. Find them in a row and each one is worth more than the last, with the seconds left on the clock added when you clear the level.

Ten levels, offline, no accounts, nothing to buy.

Features:
- One rule: find the tile that does not match
- Grids from 2x2 up to 5x7, difference from 30% down to 7%
- Boards are fixed per level — no luck, no unfair runs
- Streaks and spare seconds both count towards the score
- Best score kept for every level
- No forced ads, no pay-to-win, works fully offline