hi,

not the first time i see this, somebody makes a game with his own gameplay, with his own graphics style, but then he makes several others games with the same gameplay, with the same graphics style but on different themes (for example : winter, spring, summer, automn, or christmas / easter, or halloween, zombies, space, medieval, egyptian, etc...)
i just found such an example today, because i plan to (try to) create a game in a maze ( Pfaber influenced me

), so i was looking for which maze games already exist, and i found several "iterations" (clones ?) of some games (on the steam store)
i think it is quite good idea, as long as the gameplay is fun enough and the graphics style is nice enough...
at least you know what to create next lol ( i am more a technic guy than a fiction guy

)