In my case is more that I bit too much I could chew, adding features on features without thinking that everything has a cost. Every line of code added on a such complex game has a weight. You tweak how attack is calculated? everything related to that changes! and so on. And with a big project even if you wrote the code yourself, or in my case even if I'm very familiar with the framework, there are things beyond your reach, like discovering that the game is just too big/resource intensive to work well on mobile (I honestly don't know how people can play it on mobile, is too slow, but some people got it there).
So it's not about me tired of some creative task. Is not that: just a few weeks ago wrote the storyboard of a dating sim, and I keep having ideas for new stories. The problem is that because of all that coding on SOTW, now basically I HATE CODING, even simple stuff
and will take me a long time to recover. That's why I don't want to get into this situation anymore by doing a game that was clearly beyond my capabilities, or in any case an insanely HUGE project to do.