Pac Block Puzzle begins with an blank 10x10 grid of squares and three colored, irregularly shaped figures at the bottom of the screen. These figures are an arrangement of blocks the same size as the blank squares in the 10x10 grid. The player must drag these blocks onto the grid, and after the blocks are dropped, they are unable to be moved from where they were placed. As soon as the three figures were placed on the grid, three new figures appear to be placed. This continues for as long as the game is being played.