Classic is the endless game. You get three pieces at a time and put them on the 8×8 board in any order. Fill a row or a column from edge to edge and it pops. The game ends when none of your pieces fits.
Each block you place is worth 1 point. One line is worth 10, two at once 30, three 60 and four 100. Every move that pops something raises your combo, which multiplies the line points. You get one undo and one rescue in each game.
Drag a piece onto the board, or tap it and then tap where it goes. On a computer, the keys 1, 2 and 3 pick a piece, the arrow keys move it, and Enter or Space places it. There is no sign-up, and your progress saves as you play. All the rules and scoring