I'm kind of surprised that people are complimenting the music so much. It's an eight-second loop of a different pad for each level! But hey, sometimes that's all you need.
The main menu effect was a bit of an afterthought, honestly - I knew something like it was possible from seeing framebuffer effects on PS1 games, and I had the idea of using viewports from Raffaele Picca's talk at GodotCon 2023, so I think I had it done within an evening.
Thanks for playing!