The goal is to exchange hexagons to connect all the colored nodes. This online puzzle game has 72 levels that will test your brain and patient. Have fun! Knot Logical Game, puzzle game, logic game, brain teaser, HTML5 game, connect nodes, hexagon puzzle, strategic thinking, spatial reasoning, problem solving, online puzzle, math puzzle, challenging puzzles, brain workout, cognitive skills, level 72, puzzle levels, color matching, connecting lines