Thanks, I will try that.

By the way, I tried OpenRCT2 but I can't scroll down with the mouse.
All other directions work but down is only possible on keyboard.

Thanks again. It seems to work flawlessly now. I also had some distortion in the menu music every minute or so and now it's gone.
But unfortunately I can't run the game out of GOG Galaxy like this, so my play time won't be counted.

Edit: I'm still having minor sound distortions but they're infrequent and very short, everything else works now.

OpenRCT2 is in early beta. I've managed to get it to scroll at the edges, but RCT2 being based on RCT1, being based on TTD was more of a 'right click and drag' to scroll sort of beast anyway. It is enabled in the options, anyway.

I've had my own issues with RCT1, but RCT2 runs better and that might give you a better time.