It wouldn't go past the loading screen, so I found out it was an issue for CPUs with more than 8 threads, according to this post: removed due to not being allowed to link, I guess? Anyways after that it crashed in the first level which apparently was due to RAM, so I had to find a fix on some random forum post from 2010 to make it run on Win11... Something called Large Address Ware? Anyways, it worked it the end, but I thought the whole point of GOG was making Good Old Games run on modern PCs....