I would love it if you would make a clear license file. For example, am I allowed to use these in my games? Perhaps you intended them for personal or non commercial projects only? I might assume since that you are releasing them to the world and asking donations that you are intending them for any use, but I am not sure I can assume that legally. A license file clearly indicating what rights are granted would clear this all up.
Thank you! Teşeküller!