As of today, this game is badly broken. If at some point the author fixes it, I will remove this review and post a new one. The game contains something like 20 or 23 sex scenes, and I was able to find maybe 6 which (mostly) worked, at least 6 which didn't, and I didn't look for the rest of them, I assume the remainder went about the same.
Scenes that didn't work at all were the following: the bar scene was a complete mess, everything was in 2D(I'm in VR using a quest 3) and upside down and it was impossible to navigate. The space scene was broken, textures didn't load and I gave up and left. The sex fantasy world was broken, in that my view vibrated wildly continuously and I had to leave. It looked like there were 2 scenes that led off of this hub, I tried one of them and it vibrated too so I gave up. There was an exit to downtown (I believe, it was near the strip club) which didn't work, once again everything was 2d and didn't load right and the exit didn't work so I had to reload the game to continue. The pool scene was broken, it also vibrated wildly so that I couldn't function, but there was a 2nd pool area leading off of it, and this one did work. Note that the exit from the vibrating pool scene was broken, so that I had to reload the game to exit this area.
In addition, some of the scenes which did work also had problems. There was a university class room scene that worked, but the exit was broken and so as before, the game must be reloaded to leave. There was a party scene where again the exit in the bedroom was broken. Also, to get in to the party scene you have to click on a wine bottle, and this was broken. I figured out that if you actually grab the text in front of the wine bottle and move it, this lets you afterwards click on the text and pick up the bottle, but still, not working right.
Note that this game has something like 70 missing dependencies, after installing the author's files, which is no doubt why it's not working properly. When you buy this through the author's patreon, he provides 2 zip files, Sex Open World.zip and Basics.zip, neither one of which have the missing files. The author believes the game is working correctly; he is mistaken. Note that the game spits out error messages pretty much every time you load any of the zones, due to all the missing files.
My suggestion to the author is take a fresh install of virtamate and put his 2 (unzipped) files into the proper virtamate directory and see how it runs, so that the many bugs will become evident.
In the event that anything I've posted here turns out to be inaccurate, I'll delete this and repost a fixed version or a new proper review if a functioning version of Sex Open World can be had.