1. Would it be against the rules if I were to only add one level to the game? 
Ex: Let’s say in a regular Mario game there’s only 6 levels, in my fan-game it would only focus on a new level called “level 7”. Would that be against the rules?

2. Would it be against the rules to only make one change to a level from an original game? 
Ex: The final boss of a regular Mario game is Bowser. But in my fan-game the final boss would just be a different enemy or simply robot Bowser that is more harder than the original. Would that be against the rules?

Thanks