Why does this game demand administrator priviliges to run? This makes no sense. Please fix that.

It's likely that the game has to access specific files or locations on the OS that require full admin privileges which can't be fixed as it will most likely break the game and render it unplayable.

I guarantee that if this is a problem to be fixed, then it will be the game creators (Subset Games?) who will need to change it. If you feel strongly about it, then you should report it to them rather than kvetch about it on GOG's forum.