How about a ball that's on fire? It works the same way as a normal ball but is constantly topped by flames. It can travel over any blocks but: A dirt block is burnt by it and cannot be stood on afterwards If it falls into water the flames are put out and it becomes a normal ball Any fence pieces it touches are burnt away making them disappear Just an idea.
Hmm…. Nice idea, I like it. It’d be great if it interacted with B just like zappers. I mean, the fireball would have hitboxes of both balls and zappers, and the ball one would kill B. Zapper hitboxes would be useful for other purposes. (Stuff in italic is edit)
Maybe we could also add oil (block?) to the game such that when the fireball moves on a road covered with oil, the whole oil surface will burn