you missed the point.
Complaining about what has been added is another thing. But I would never complain about whether other people are allowed to suggest stuff or not, even when I don't agree about the content of the stuff they suggest.
Again...Mofu is the dev here. If he thinks an idea is interesting, he adds it. It's simple. If he later thinks that idea wasn't that good after all, he removes it or changes it. He has total freedom to do so because it's his game.
Trying various things leads to gaining lots of valuable experience for future, more important projects.
If you want to support mofu, then let him do his thing.