Nut Sort: Build the City, developed by Cosmos Pixel Games, is a color-sorting puzzle game wrapped around a city-building goal. Sort nuts and bolts across thousands of levels of varying difficulty, and watch 14 unique cities take shape as you progress. Bonus levels unlock after every 5 regular ones, and built-in hints let you view a solution or add an extra bolt whenever a puzzle has you stuck.
The objective is to sort all nuts by color so that every bolt holds nuts of a single color. Tap the bolt you want to take a nut from, then tap the destination bolt to move it. Only the topmost nut on any bolt can be moved, and a nut can land only on another nut of the same color or onto an empty bolt. A level is complete once every bolt is single-colored.
For more logic challenges, the full range of puzzle games on Playgama covers sorting, matching, and spatial reasoning at every difficulty level. If the brain-training side of Nut Sort appeals to you, browse brain games for a deeper collection of mind-sharpening puzzles.