Hi! I think there is some confusion about the limits of use of these songs. At least in the way I authorize it, what is prohibited is modifying my songs to create a derivative work (musically speaking, a remix, in which an artist modifies an original song to adapt it to their own style). Any change in file format or compression is allowed, so feel free to use them in whatever format you need and that is optimal for your game.
Feel free to share your work, I'd love to see what you do. :)