I agree with everything you said, except I think a perfect idea would be perfect regardless of any imperfect executions. Your vision for a game might still be p

I agree with everything you said, except I think a perfect idea would be perfect regardless of any imperfect executions. Your vision for a game might still be perfect, but you might derive less pleasure from thinking about it because those thoughts are now tangled up with your feelings of failure. For another metaphor, the imagined perfection of a member of the opposite sex, and the inability of reality to match that expectation, is a consistent trope in art and media. Happy Together, by the Turtles, pretty much any song written by River Cuomo (Weezer), 500 Days of Summer, etc. I think the issue is that our individual understanding of perfection is flawed. Perfection is more like Plato's forms, in the sense that something perfect might exist, but we can only begin to imagine what that is. Perhaps Plato is right, and perfection cannot exist in reality, but failure to attain perfection in reality would not cause the true form of something to be any less true.