Sort four tiles at a time by their secret category.
- Select four tiles then press 'Enter' to see if they belong to a common category.
- Continue to play until all four categories have been found.
- Press 'Clear' to deselect tiles.
- Press 'Shuffle' to switch up the order of the tiles on the board.

Category difficulty.
- The categories on the board range in difficulty from easy to hard.

Categories.
- There will be four distinct categories such as:
Cities: New York, Miami, Los Angeles, Chicago
_ Day: Mother's, Labor, Memorial, Valentine's