Yes, you are free to use these tracks for commercial or non commercial projects.
The only things I ask is that you not share the music with people who didn't purchase either the pack itself or purchased it in a bundle. (Obviously you can let them listen to it, but they cannot use it in their projects.)
EDIT: Also, if you can provide a credit as:
"Music by Bert Cole
www.bitbybitsound.com"
...it is very very much appreciated, and helps me out a lot. :)
The only other things I ask is to let me know when your game goes live, cuz I wanna play it! :D
Enjoy the tunes!