Since I see you posted a similar thing on another project of mine, I can only assume there's something your computer really doesn't like about games made using Naninovel in Unity :(
What that could be I have zero idea without troubleshooting, and that would sadly be impossible at the moment as I am too unwell to get on my PC. It would also require me to export and send to you a separate dev build of the game for you to send me any error logs that your computer generates, so quite longwinded >.<
I know it's not helpful to say, but plenty of other people have played this and Darling Duality from start to finish without any issues at all, so it must be something specific to your device :(
I appreciate you checking out the games regardless! I'm just sorry that they don't seem to work correctly on your computer for whatever reason cos that sucks for both of us T_T
That's just one of the woes of everyone having different devices I guess. I know everything I make works on both my PC and on the family potato laptop (albeit slower loading on the potato) cos I test stuff for ungodly amounts of time before releasing, but that doesn't mean the games will run perfectly on every device out there, unfortunately.
For big companies, it's not so much of an issue cos they can get a whole team to troubleshoot, but I'm just one person making games as a hobby x3
There are a billion different reasons that a PC could fail to run a game properly. I've come across a fair few bugs in other people's indie games I've played. Sometimes, I'll download something that has no sound at all, even though I've seen video playthroughs and know the game has sound. I know there's something my PC doesn't like about the game for there to be no sound for me, but I have no way of knowing the cause, and the dev wouldn't stand much of a chance of figuring it out without going through time-consuming tests.
Computers can be a nightmare sometimes >.<