A simple way to help people track their status/progress in a mission is with a progress bar. For example, the user has completed 2 out of 3 steps in a mission. In the report about that mission, we could quantify their progress as I did above, with percentages (i.e. 66.66666…%) or with a simpler graphic like this one:
I will prototype this inspiration in more detail later after I work on the account creation and puzzle-submission mechanism.