You can press Space to trigger the balls manually! :D
As far as chat commands go, it would require a bot to be setup by the user, which I don't want people to do.
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I bought this so that my viewers could interact with me and not for the manual ball throwing effect. I only learned that it requires channel points to work for interactions from the readme, after buying. That's not something one would expect from reading the description alone, so I did not ask beforehand. Please make this clear in the tool description, because this tool is of very limited use to those who do not wish to be partner or affiliate.