Hello Panda,
First of all, thank you very much for playing our game.
To answer your multiples questions, first of all, these songs are royalty-free music aviable on Epidemic Sound.
Concerning the frozen screen, we didn't encounter this during our test but we're gonna be aware about this, we already discover few bugs, and will be fixed in the next update, along with minor adjustements.
Thank you for the linguistic correction, as we're not native english speakers, some mistakes may slipped through our hands. it will also be fixed in the next update.
Thank you for enjoying our game. We'll for sure test yours games !
♥
Forest