Thanks for the feedback (and congrats on the clear!). I made the sfx with https://pro.sfxr.me/. There are a few things I did to try to make them less grating: high pass and low pass filter to tone them down a bit and the repetitive sound effects all have variants (3 or 4 of them) and the game randomly plays one of the variants. This helps it be a bit less annoying.
Making good sound effects is something I’m still trying to figure out, it’s a tricky art!