Hello! Sorry, it's been a while since I've made this and am no longer working on this specific project, though I am updating the game through a new one.
That being said, I have the list of sites and artists I've used for sfx in the game:
Music:
Fesliyan Studios (https://www.fesliyanstudios.com/)
Melody Loops (https://www.melodyloops.com/)
Twin Musicom (http://www.twinmusicom.org/)
xDeviruchi (you can find on https://xdeviruchi.itch.io/!)
Sound Effects:
Kenny: https://www.kenney.nl/assets/category:Audio
MixKit: https://mixkit.co/free-sound-effects/video-game/
I hope this helps!
- "S.A" Omene