There is a bug with Mini Micro in the WebGL version that forces me to play the music at max volume for one frame each time the track loops. If I don't do that, fading the music would not work on the web version. I think it was a necessary trade-off since the music changing while inside the bubble was very important to me. I didn't have flickering issues but thank you for mentioning it. I'll put the blame on Mini Micro's dev 😆