I saw the site did indeed unpublish your submisson due to suspected spam. This particular day of the year tends to provide me with very little time to administrate the site, so I have only recently been able to look into this. The links of the post are all fine, but I had a few questions for you about the content:

• Are any of the characters in the submission the same characters, in name or disposition, as the characters in the original game or manga? I'm guessing all the assets are made from scratch, but there may still be trademark implications if the characters overlap with the game that your fan game is based on.
• Can you indicate where the other artists who created the assets have given permission to release these assets under the CC-BY license? Although you may have comissioned the assets, the original artists still possess the copyright to them unless there is a contract showing they transferred those rights to you as a component of the exchange. Unless that is the case, the other artists still need to be asked permission to share their assets outside the original commission terms/project.

Sure. And thanks for your earlier responses.