The rest of this presentation deals with what to do or include in a game in order to entertain a large audience. That usually means creating something that is commercial art, not fine art. It is natural to be inspired by successful games and practical to borrow from them when creating games of your own. To be successful, however, new games must be clearly differentiated from the competition and innovative as well. Games that imitate without differentiation and innovation are considered clones.
Clones are usually commercial failures.
Any new game will have competition in the form of games very like it in topic, style, or genre. To succeed the new game must match or exceed the competition in those areas where their game excels. The new games must also exceed the competition where it is weak. Identify important features and components that the competition is executing poorly or not at all. These are your opportunities.