Sorry you got the copyright claim but I think yt ai flagged it. Because the soundtrack is COPYRIGHT-FREE content I got from Pixabay.
I have the certificate for it too. I'll add it as downloadable on the game's itch page. You can use it to remove the copyright claim.
Here's a link for the soundtracks so you can check it :
BGM Home Page :
-> (Old version) https://pixabay.com/music/synthwave-retro-synthwave-background-soundtrack-341853... ,
-> (New version) https://pixabay.com/music/house-house-556493/
BGM Gameplay :
-> https://pixabay.com/music/dubstep-epic-metal-dubstep-cinematic-144716/
(This is the track with the claim, but in Pixabay and in Youtube it is under a different name and author, so I don't know how that works)
Viewing post in Attack Overload jam comments
yeah the problem with copyright free music is that there is a loop hole that some companies abuse, even if the artists don't claim it, they can claim it if they register it as an arrangement (like an album) =_= yep... Its alright don't worry about it, YT is a hellhole now on copyright claim issues with music, even completely original songs that sounds too close to someone else gets flagged.