As the dev who is the least into vomit noises, I also want a "no vomit noises" setting, thank you for requesting it, it makes it easier for me to justify making it :D
About the lag, we have some ideas for when we expand it. Currently it doesn't lag on our machines though, even in web. What kind of specs are you playing on?
Hi, sorry for the late reply; I didn't get a notification for some reason! I'm playing the web version in Firefox, on a Lenovo Thinkpad with 16 GB of RAM. The lag isn't nearly bad enough to be game-breaking or even really annoying, just a little "woop, might not be able to run this forever / add too many bajillions of plants" flag, you know?
"No vomit noises" gang :D