A free app for Android, by Alcyone.

Brick Number Knot Free – a free puzzle game for adults and kids! It is an exciting, challenging, and engaging game for both children and adults of all ages! The game is designed with beautiful colorful graphics, so it looks amazing on your mobile screen. You will be challenged to a high degree, as the level packs contain over 2000 levels, and every level is to be solved. You will need to connect bricks with matching colors, and cover the entire board with bricks to solve each puzzle. But watch out, connections will break if they cross or overlap! The game is always color matching to 3 stars, so you can get 3 stars on each level, and watch out, don’t overlap your color pipelines when matching them.

You will be given a certain number of moves to solve each puzzle, and if you run out of moves, you will have to restart the level. The game will let you know when you have used up all your moves, so that you don’t have to wait until the next puzzle is unlocked.

There are 5 different difficulty levels in this game, and the more difficult the level is, the more stars you will get.