Ball Sort Master is a sorting game with a laboratory theme. The player sorts colored glass balls in test tubes until they create one-color stacks of balls. They also attempt to earn as many coins as possible for their efforts.
The game initially displays basic test tubes. The player selects a ball, and the game then transfers it automatically to either an empty flask or a space above a ball that matches its color. If more than one option exists, the player must select a specific container. That said, they receive hints above each test tube that provide them with direction.
If the player struggles to sort the balls, they can use bottom-central tools to help them. They can select a back arrow to undo a move or a light bulb to auto-transfer a single ball. They can also use a button marked with a test tube and plus (+) sign icon to add an extra flask to the play area.
Ball Sort Master offers a wide variety of skins for the balls and test tubes. The player can also change the background theme. They merely need to view ads to unlock and use these options.
The game also displays the player's ranking on a global leaderboard. The player can access it via the lower-left button.