I know there was no hostile intent, and I'm glad that OP is having fun, but hopefully you understand why I feel a slight pinch when I see something that is so close to what I've built making the rounds on HN with zero acknowledgement from OP.
If we just go by a description of features, we've both built a grid sequencer in JS, with a built in synth that is designed to play on a scale so that everything comes out "sounding good"... With a serverless architecture so that you can share the tunes with anchor tags. It's precisely the same idea. How would you feel? Would you be able to be completely detached?
I did promote MusicToy a bit. The original MusicToy made the rounds on reddit 8 years ago. MusicToy2 has had the same (small) base of active users for about 1.5 year now: https://mt2.musictools.live/
Either way, I should probably look at this as a learning experience. It shows that I didn't promote my project as well as I could have. My project could also use better mobile support in terms of auto-scaling the page for mobile displays.