Could you add a little more explanation?
I reckon any properties that infinity or NAN might have are pretty covered by the star key in world 7.
If you've beaten world 11, I guess you're referring to quarternions? Not sure how easy to make puzzles with they would be...
There's a different lock/key game coming out that will have percentage doors, but I don't know how remainders will be handled.
Here I go, explaining what I thought you were talking about instead of waiting patiently...