You begin with a few red stones - you must line up 5 stones of the same colour to clear them from the board - the line can be horizontal, vertical or diagonal - if you clear a row you get a free turn - each time you fail to make a match you will get 3 new stones of random colour dropped in a random position - the idea is to keep the board clear as possible so you don't get JAMMED - made with construct 2 using RexRainbows chess plugins