Dream tradition sees the snowball in two ways: as light-hearted play with others, and as something small that keeps growing as it rolls. Being hit by one is read as teasing or a minor sting.
Does the traditional reading fit your dream, or did it mean something else to you?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.