"Uhm. Sex in exchange for money. So ... marriage is also illegal? There must be money involved, otherwise there would not be payments after a divorce. Money is involved in there and refusing to have sex is grounds for a divorce."
Firstly, in porn, people are being paid to have sex. In the case of porn, there just happens to be a camera present to capture a video. Why would the presence of a recording device suddenly make the word prostitution not apply?
Secondly. if this is your view of marriage, then it is a sad view indeed, and an insulting one to the many happily married couples throughout the world who have a relationship built on more than mere sexual transaction. Marriage is far more than a simple sex-for-money exchange. It is about companionship and support, and creating a loving environment for all members of the family. Or at least it is meant to be, though I will admit in many cases sex and money become points that can destroy a marriage. But all of those things are lacking from both porn and prostitution. Again, if this is your view of marriage, I pray that one day you would see the light, because a good marriage is to porn what a star is to a piece of gum stuck to the bottom of your shoe.
As for cartoon porn, I would not dispute that it is "further away" from the real act of sex than live action porn. Sure, it is a drawing of sex. That doesn't make much difference to me. I would find a drawing of sexual assault in poor taste. I would find a real photo of it in even poorer taste. I would find either one in such poor taste, in fact, that I would remove it from my website if anyone posted it there. And that is my main point: that it was fair for itchio to remove the game.
I asked the question about legality in response to the rant from OP which seemed to insinuate that the removal of this game from itchio was an act of censorship. I do not think it was, because I do not believe porn to be a form of protected speech. Or if it is under legal definitions, I don't think it should be. What idea is it expressing? To protect porn as speech could mean that a platform owner could get into legal trouble for removing it (in theory at least). It seems like madness to prevent a platform from removing porn because of free speech.
"The content might be disgusting to many. So what. Taste is individual and what one adult views as entertaining is not the business of another adult. What fictional things are "allowed" and which are not should not be subject to the moods of angry people. If we want to have free speech and things like that, we must allow all of it. Not only the things we deem appropriate."
No reasonable person truly believes this absolutely. When things "one adult views as entertaining" cross certain lines, they drop this line of thinking. CSAM, for instance. I'm sure you wouldn't say "So what" to that. My point is not that this game and CSAM are exactly equivalent, and it is definitely not to suggest that by supporting this game you support CSAM. The point is that we can't allow everyone unfettered access to anything they find entertaining under this false guise of "free speech".