lunchboxx1990: I get to a certain point in the marine mission where I get the level complete screen, but when I press a key to continue, it takes me back to the main menu, and the first level still reads as unbeaten.
I cant seem to progress to the 2nd level at all.
Am I doing something wrong?
Try replaying the level and when you get to the level completion screen, press Escape. It will restart the level. Then exit to the main menu manually (Escape -> Abort Play). It should count the level as complete.