This kind of thing happens in gamedev, it's no big deal 🙂 especially when you experiment with a new idea like this. I still think this is a brilliant concept, but it's certainly hard to make work... I feel like it's possible to iterate enough on his to make it fun, but it seems like a pretty tough design challenge.
And yeah, sound is tough 😅 the big thing is just making sure it's not too grating on the ears... I always use lots of random pitch-shifting to try to make repetitive sounds less obnoxious, but it's also down to the sound effects themselves, which are tough to make. Really great developers (see: better than me) provide sound options even in itch jam games, letting the users tune the volume of the SFX and music independently.
I recorded videos on all your games; I just need to come back to Super Quadrilateral Damage to get further. Expect videos on them Soon™