Untangle - logic puzzles. The game has many riddles. In the beginning there are easy puzzles and later the logic puzzles are more difficult. The purpose of the game is to untie the wires. if wires intersect they are painted with red. once you will solve the logic puzzle the dots will become green and you can move to the next level. this is a great way to train your thinking and increase your brain IQ. we have more brain teasers games so check them out.