Hints. Do you have doubts about what move you should make? Are you puzzled? Use hints! This is the most unique feature of Ball Sort Master, which you don’t find in most logical sorting games. Now you don't have to puzzle over what move to make for hours. Undo. We sometimes make mistakes while solving a puzzle, don’t we? Now, you don’t have to worry about that! Undo your move! Extra tube. This is a super-helpful feature for sorting and achieving the next puzzle level! Use an extra tube and make ball sort levels easier.