The smileys must be connected in pairs to be happy. Connect them by drawing lines without crossing each other in the grid. All the boxes must be filled in to go to the next level. Be aware that only one solution is possible to solve each challenge. There are 5 levels of difficulty, each with 30 levels. You will face puzzles with increasingly large matrices and a limited number of moves. So think carefully about each of your actions, especially since there is no time limit. Enjoy!