My Asteroids Clone know has a manual I just added to give some instructions during play. In fact it is 3+ years since I touched the code, but it was easy (like in less than an hour) to add. Nothing beats modular code, and of course I made a new class for the manual, making it easy to insert to the Game State machine ;-).

Coding is like therapy for the soul, you think of almost nothing as you sit and implement new features focusing on making it easy to maintain. BTW this clone is a tribute to Ed Logg who made the original!