Hi, you can use the assets in commercial and non commercial projects. If you make modifications and you share them you must use the same license, CC-BY-SA or CC-BY-.4.0, and credit me ‘Chasersgaming’.
There is some confusion over my licensing, for which I am trying sort, and will hopefully have that sorted with the newer works. I originally set my license for CC-BY-SA, but itch does not include it as an option, so I had to select CC-BY-4.0 in the metadata as this was the closest.
That said this particular asset(footaball) is CC0, public domain so you are free to use how you want for what you want, commercial, non commercial, make modifications,edit etc with no credit necessary, although always appreciated.:)
Hope that helps. :)