Is this okay to be used for unlimited commercial projects, or just a single one?
the item is sold according the license provided by Scirra's store:
https://www.scirra.com/store/licensing#license3
"Permits Royalty Free usage for one single commercial project.
You are permitted to use the asset on unlimited non-commercial projects."
So be careful, I will check all your commercial projects to see if it contains or not the template <img src="{SMILIES_PATH}/icon_mrgreen.gif" alt=":mrgreen:" title="Mr. Green">