/t/3693485/do-not-update-your-games-by-deleting-them-and-uploadin...
That might have happened. It is an annoying feature of Itch.
The dev also might have deleted the game or made it unavailable. Or the game was removed by Itch.
(If it is still here, and the dev tagged it appropriately, maybe you will find it in here /games/tag-giantess)