There was a typo that I made while coding that did not enable saving and loading of Earth's mission highscore. That is now fixed.
Not being able to press Escape to go to the options is also fixed. But you may need to delete the folder at %localappdata%/Space Extra. Press win key + R and then type in %localappdata%.
Sadly, your progress will be lost but the game won't be bugged if it is bugged.
Changed files in this update