Hi folks!
In the "Update the SpriteFont Description" section, there are only two regions highlighted, but the CharacterRegion.End element should also be highlighted, as by default, it's set to  .
If this isn't updated to &126; as is shown in the tutorial, the game will crash since the character map only includes a single character after creating a new spritefont file.
I'm opening a PR to fix this issue.
Thanks for the great framework!