Hey there
1. First of all, do you have a dedicated GPU in your system, or are you using the integrated GPU of the i3-9100 (UHD Graphics 630)?
In case you don't have a dedicated GPU, I don't think the UHD 630 will be able to handle everything .
The intro scene is pretty bare bones, so I didn't include an option to change graphics there because although it might lag, you would be able to change the graphics right after clicking play and loading the first level.
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2. That could be a possibility
3. I was thinking of adding a sex scene in the bathroom
4. A customizable character is currently in the works, but there are still a few issues that I have to address beforehand
Edit: After seeing your screenshot, the error is often associated with running on an integrated GPU. To avoid such errors, I recommend using a dedicated graphics card. Integrated graphics may not provide the required performance, and it can also impact the available processing power and memory of the system.
If you have access to a system with a dedicated GPU, try running the game on that.