the admin decides that you don't deserve the result you have and takes it away from you
You assert human agency. And then base your reasoning on this, as if it were true.
If it were true that someone decided your stuff should not deserve your results, you would have been de-indexed. You are not de-indexed.
While it looks like something did happen that was out of the ordinary and screwed with ranking big time, your game will recover. There is a pool of people looking for games like yours. While that pool might grow slowly as new people discover itch, you still have an area to expand in that can be considered finite. If you do not reach them today, you will reach them tommorrow. But the other way around is also true. If they already checked out your game, why should they do so again.