Thanks for checking out my music and sound asset packs!
I looked into this and have updated the licensing information which can be seen in the "more information" of the description area.
All my asset packs on itch are under Creative Commons Attribution v4.0 International.
You’re free to use them for commercial or non-commercial projects, royalty-free, non-exclusive! All I request is that you credit me somewhere, if possible, in whatever way makes most sense to you (perhaps “Music and sound effects by Daniel Vincent Neuffer”).
Also, from a game developer standpoint, would you also like me to provide alternative file types like OGG or 16 bit wav instead of 24 bit wav files in order to have smaller file sizes for your project?
Let me know if you have any other questions!