itch.io

The paid version of the game has the option of turning off the trypophobia but I don't know if the demo version has that option. Trust me, I played the paid version a bunch of times now and thankfully didn't encounter any doppelgangers with holes after turning it off so it's safe to play!

I can confirm what Violetcloud said now, I finally got to purchase the full version, and the option is available there (although I didn't check the Demo to know if that's where you're coming from)