We have some issues with the tram and the save game system in episode 1. They will be fixed when we release episode 2. So for now you will have to restart the prologue or go directly to episode 1 in the menu to skip it. Or you can load the maps directly through the console so that you dont have to start from square one in the prologue. Open the console and write 'map ep1/e1m1_1' to begin the last map in the prologue from the beginning.
When you change display options you need to press the 'reset' button in the options menu in order for them to update. We made this button available so that you dont have to exit the game in order for them to update.