Thanks for reposting this! I'm the developer (BaselAshraf81) - happy to answer questions or hear suggestions here.
If you find it interesting, a star on the GitHub repo helps a lot.
And don't forget to follow me on github, I build cool stuff!
I just entertained myself with this for 30 minutes.
Those ads are nasty and really take away from the cool stuff you build!
This is very cool stuff, indeed!
This reminds me of a tongue drum I have. Have you thought about building an iterative solver for specific scales?
It would be interesting if you could simulate and then print (or laser cut) your own instrument on demand.