Player elements
Provide a lesson on Player in a Platformer game.
Player interactions
Make a lesson and code around the player. Integrate ideas so they can be adapted by the Teacher project, perhaps as a different level(s).
Ideally, some interactions would be added to the platformer game. Or, there could be a new level to the game that is more has more RPG-like experience. Remember, how the dog interacts with the Monkey in Game1x.