REGARDING THE NAME ISSUES
Okay, this took me a good hour to figure out, but I managed to find the issues which were causing the problems with inputing the MC's name and the name appearing above the text boxes.
So, essentially, there were a few coding issues in the script.rpy file. Two lines around the name-input-area were missing, and the MC was mislabeled in the abbreviations which should indicate the name appearing above the text boxes (not sure how these are actually called).
What I did was add the two lines of code and fix the abbreviations for ALMOST the entire file. I purposefully did not change it for the prologue scene right up until you get to input your name, because otherwise, it would've shown the default name digi set, which I felt was a tad weird).
I've attached the fixed script file below. What you should do with it is place it in the folder called '_mainrenpy'. You'll find it in the 'code'-folder, which in turn is located in the 'game'-folder.