These free Mahjong tile games are fun, plus they train brain skills such as concentration and visual perception. Clear all matching mahjongg tiles before time. This is one of the best Puzzle game. If your brain is not yet fully awake you can play Kids Version and then move to Shanghai Version. Select a skill level by clicking "For Kids" or " Shanghai ". The goal of the game is to remove all tiles from the screen. The rules are that you can only remove tiles by.