It's surreal to see a game that looks and sounds this good running on a GBA.
one question: are you going to upload the music anywhere?
Game's source code and assets are open, so you can get the music from here: https://github.com/GValiente/butano/tree/master/games/varooom-3d/audio
Please check the licenses if you plan to use them in other projects: https://github.com/GValiente/butano/tree/master/games/varooom-3d/credits
You can listen to the music here too: Stream tempest | Listen to Varooom 3D on Game Boy Advance (2021) playlist online for free on SoundCloud