:D Wait, did you say you published 18? story-games?! That is an impressive feat, it could be that you hold the record!
Let me add to what I said before, that it would obviously be best to have both quantity and quality, but often there is not enough time to do both, so when you can only do one or the other, quality is more important.
I would also like to say that a story, can be, but doesn’t have to be long to be awesome. (Sometimes readers lack time as well as authors.) That is true for speeches too, as Lincoln’s Gettysburg Address is still remembered to this day.