Hey everyone. I've recently bought this game to relive some childhood memories.
When I start up a campaign the speed of the game is very high right from the start.
I basically am unable to click anywhere or change anything before the first video pops up which is quite frustrating as I want to be in control from the very beginning.

Does anyone know of a way to turn it down before a game start?

Somehow the game thinks you're holding down the right mouse button. I think right-clicking somewhere when the "New Game" options menu should take care of that; it did for me.