+-/* Addition, Subtraction, Division, Multiplication of the tiles on the board, by sliding the number squares into each other with Up, Down, Left, Right moves & then choose which operations you want to do with those numbers so that you can get the results of your mathematical calculations to match your current goal!!! In endless mode you have to creat the tiles in numerical order starting at 1 & working through endlessly!!! Or maybe try to beat the clock ⏰ in timed gameplay!!!