Hello InsidiousMage,Just got the game as well and missions are disabled when playing the tutorial. The boxes will get a yellow highlight once you've completed their objective and then you click them to get a checkmark showing that they are done.
Thank you for your answer. Your description corresponds that I had in previous version. In version 2.0.3, The Mission Objectives window cannot be opened when it has been closed. So I don't see the next objectives when I have finished the first.
What is the version number of your game ?
Regards