Do you understand that CCBY4 means? That people can even sell your assets...
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Not any of CC licenses... There is CC-BY-NC (not commercial) but it also prohibits use in commercial games. I would say that CC licenses are primarily for those who want to share, share without restrictions (there are some of them but...)
Did you decide to use CC license because you read about it on the bottom of the jam page? I think my warning wasn't effective.
If the answer to previous question is yes, formally the link stated it:
3. Freedom to share copies of the work for any purpose. When you get a copy of a free cultural work, you can make and share as many copies as you want, wherever you want. This means you can put it on your blog or website, include it in books, share it on file-trading networks, sell it in stores, give it away on CDs–there is no limit on how many copies you can make or where you can copy them, and you can use them for any purpose, even commercially.