10x10 Fill the Grid! is a fun, block-puzzle game presented on a 10x10 silver-gray grid framed in white. The player's primary objective is to fill and clear the grid with horizontal and vertical lines created with different shapes of block tiles to earn trophies and gemstones.
The player uses gems to acquire new colors and themes of block tiles. The game initially provides rainbow- and gray-colored tiles. The player can use the yellow button marked with an artist's palette and brush at center above the grid to access other themes, including winter snowflakes, white outlines of sea life and green, red and yellow fall leaves.
The player can track their available gemstones to the right above the grid in an area marked with a white gemstone on a blue background. They can also check their current and all-time points represented as numbers next to a white trophy on a gold background and three white trophies on a purple background, respectively.
At the end of each game, the button labeled with a white medal and ribbon on a wine-colored background near the top left corner updates to tell them how many gems they earned based on a variety of special moves they completed during gameplay. For example, they earn five gems for removing three, four or five lines with one block. They earn 10 gems if they clear vertical and horizontal lines in a crossroad layout with one move.