I found the problem. In alpha the splash screen menu items are invisble, but you can still click them if you know where they should be, if you learn there location from using stable.
I've started adding in a comprehensive and historically accurate information system to let the U-Boat enthusiast dive deeper into each component. By double clicking on any interactive component, you can get more info about it.
For this first MVP (minimin viable product), the diesel engine and superchargers have been implemented with some initital text.