The extra restrictions "You may not redistribute, resell, or repackage the assets, even if the files are modified." conflict with the license you've selected. Forbidding redistribution and resale makes it effectively unusable. I know you meant people can redistribute/sell it within a game but not by itself, but it still causes unintended legal entanglements. That being said, you already have it licensed CC-BY. That means anyone trying to resell it by itself are required to link back here. No one would pay that person for it when they can see it is free here.

Would you be willing to omit those restrictions? In the meantime, I must disable downloads on this asset to prevent people from using it in a way you may not approve of. 

EDIT: Fixed, thanks! :) 

Note that the preview images should not show any features that aren't availabe here on OGA. Per site submission guidelines:

"Your title and preview images must be descriptive of the content you actually uploaded.  Specifically, if what you uploaded is a sample of a larger pack, the preview image must describe the art you actually uploaded to OGA, and not the additional art that you are advertising.  It is fine to link to the larger pack in your description."

EDIT: Fixed, thanks! :)

Looks good. Thank you for sharing!