I am doing mission one, then finally got to mission two.
Randomly during the game I loose all onscreen text, clicking buildings does nothing, no menus in corners of screen, spacebar will swap mapmode/city view, if I hit ESC I get to the main menu option screen for save game etc however I can not click any of the buttons. I have pressed every key on the keyboard, tab, f1 f2 f3 still function normally, but without the onscreen menu I can not build any buildings.
What is wrong, how do I get text/menus back on screen.