As with everything I create, music and otherwise, this track is released to the public domain under the Creative Commons Zero Attribution License (CC0), meaning you are free to use, modify, or do anything you want with it with no restriction, including for commercial purposes. This isn't covered by the license, but you could even tell other people you made it. I don't think it would be the nicest thing to do, and I love it when people attribute and share my music, but it's not required, and even if you lied about it I wouldn't pursue you legally, because I reject the concept of intellectual property.