Multi-colored square blocks are located on the field in the form of columns. Your task in Stack Sort is to ensure that each column contains blocks of the same color. Levels start with a field filled with blocks and one block at the bottom. Insert it on top of a column of the same color. The remaining tiles will move down and you will have in your hands the block that was at the very bottom, place it on another stack of the corresponding color and repeat the process. This way you can remove blocks that do not match the overall color in the column, replacing them with the ones you need in Stack Sort.
