Ooh, nice. 

However, there is a legal conflict in the "README License.txt" 

    "You may:"

        ✅"Use, modify, and integrate these assets in your games, videos, streams, or other creative works."
(this is fine, no conflict with CC-BY since all these things are already permitted by the license.)

        ✅"Sell or distribute projects that include these assets as part of a larger work."
(this is fine, no conflict with CC-BY, although there is no way to enforce "part of a larger work." the law would say "larger work" is arbitrary. This becomes important below)

        ☑️"Credit is appreciated but not required."
(this is technically incorrect. Not really an issue since you're allowed to waive your rights, but CC-BY typically does require credit)

 

    "You may not:"

        ❌"Resell, redistribute, or repackage these assets as standalone files or as part of another asset pack."
(this is the heart of the conflict. CC-BY forbids additional restrictions like this. I get what you intend here, but it creates a legal pitfall that prevents developers from using the assets at all, even in free projects. Let me know if you would like clarification on this point.)

        ✅"Claim ownership or authorship of the original assets."
(this is fine, no conflict since CC-BY already requires the user to indicate authorship by way of credit, but I recommend against saying both 'credit is not required, but credit is required to not be given to anyone else')

Until the license conflicts are addressed, I must mark this submission as having a licensing issue. Don't hesitate to ask if you have any questions.

EDIT: Fixed, thanks! :)

Looks good! Thanks