Only two matching tiles can be removed at a time. Two tiles can be removed if they can be connected by one, two or three lines which pass only through empty spaces. The game is over if future moves are not possible because some pieces obstruct the rest and tiles are left on the board. If you successfully remove all the tiles you'll go to the next level. There is no time limit, don't hurry up and relax yourself thinking the best movement because the order removing the tiles is very important as many puzzle games. If you think that you've done a bad movement you can undo movements made. The game has 250 different levels and it will give you hours of entertaintment. This brain training game can improve short term memory and concentration. If you like it, please rate it and leave a comment.