It doesn't damage props as the ball is designed to bounce off props (to allow players to construct their own arenas and such)

Damaging NPCs is something I could add, though I may or may not allow NPCs to stop the ball when they're hit. This entity is primarily designed for PvP combat, so NPCs getting in the way and stopping the ball isn't ideal, but I think it's a fine tradeoff.

Why doesn't it damage props and NPCs?

cool

cool

Yes, it can be colored and materials can be applied to it.

can the ball be colored or have materials used on it?

i love it