Do you start the it over the Itch.io App? Or did you download it over browser in the zip file?
Someone had already the same problem, but it was just with the Itch.io app.
downloaded it in the zip
Can you write me your system specs in an email at: support@unionbytes.de
Do you have a dedicated graphics card?
PS: Sorry for the inconvenience
no worries, I do have a dedicated graphics card but I will be getting a new computer soon and I will test It then.