Not sure what to make of this entry. Obviously as LittleBeardMan says: don't use copyrighted music.
Again agree with his comments about keeping the content within the game and try having these items be discovered within the game.
That being said and this being your first submission - good job and keep at it. I actually liked the 3rd level - probably because it was fully flushed up (not just 2D surfaces floating in space). The 3D platforming on Godot is tricky one of the big reasons I have stayed away from it, keep experimenting and improving. I would suggest you to not restrict the camera as much so you can look down this should help with you sticking your landing and not "falling" through objects and again floating 2D surfaces is probably not a good idea give them some body, slopes get messy quickly and can led to problematic platforming.
Lastly, If you are looking for music - I suggestion look at: https://modarchive.org/ lots of decent quality music that authors allow you to use -just check the license section for the song you want to use