http://insomnia.ac/commentary/gameplay/
What he says is nothing new. This is the main problem, I quote:
Besides, it seems that different people have different ideas of what gameplay is supposed to mean; there is nothing like a widely accepted definition
which actually happens with a LOT of words. For example: art, love, etc.
I mean, he's right, maybe gameplay isn't well defined, but there's so much words which aren't, that you can't write about one in particular.
It's useful though the proposed solution, try using other words. But that's what words are for, you use gameplay because you think it's the best word out there to define what you're thinking.
You say this is a piece of art, because you think thats better than: this thing is very creative and makes me feel happy because of the colours and that little thing there.
Which isn't right, because then... what's creative? what do you mean by happy? why the colours? what about the little thing?
I don't know... maybe what i'm writing is obvious