I'm not sure which song you're referring to, but I used all royalty free music from the Youtube studio audio library!
The songs I used in the game are:
- Faultlines by Asher Fulero
- Glimpsing Infinity by Asher Fulero
- Sinister Cathedral by Asher Fulero
- Slow Sneak Up by Godmode
- Spirit of the Dead by Aakash Gandhi
- Voices by Patrick Patrikios
I hope this is helpful for you and I'm so glad you enjoyed the game! Thank you for playing!