This puzzle is one of the most addicting games to play free online. Tap two or more blocks of the same color where you want them to merge. The digit in the cell increments by one and more blocks are added to create new matches on the board. The game is over when no adjacent tiles on the board feature the same digit. You may strive to get 10 or try to outscore your previous record. Regardless of the goal, you will find yourself playing this idle game online on mobile or home PC every spare minute. Just try it once.