Its a puzzle game with a scribble artstyle. You got exactly the amount of buildings to fill the board, and by adhering to the games rules you need to maximize your points in each level. Its a neat concept, especially if you consider the Highscore potential of those levels. Every time you place a building next to one of the same color, you'll get +1, and every time you place one next to a building of a different color -4. By considering those rules you need to maximize the points you can get from these levels. Cute.