[rkachowski]

It's an interesting idea, but here you have the game designer taking the place of the product manager stereotype - coming up with bizarre unfeasible ideas and the programmer is to make it happen.

In any games company I've worked for the designer is responsible for mapping and balancing the rules and mechanics of the game, they would provide a specification of what "red vs blue numbers" would look like and a balanced idea of how to remove the number 5 from the game (balancing and changing the rules like this being entirely within the domain of game design). incidentally any game company I've worked at has had an extensive set of test suites.