And nobody does go to prison, they may be made to pay a hefty fine, worst(?) case.
The forum does have a certain policy regarding fan games and cases of copyright infringement in general, but that policy most certainly is not "we don't want illegal fan games here." For one part, because it is virtually impossible to make an RM2k(3) game without any copyright infringement whatsoever, and for the other, because you can put it more politely than that. OP is generously presenting a game they made using ripped ressources, not maliciously advertising a copy they pirated (arrrrrrr).
In any case, since OP has made clear they understand the situation, and since I think we can all agree that the forum staff does a rather amazing job at providing a platform for all kinds of games and complying with copyright claims, the discussion may turn back to the presentation of the game which for itself does not constitute copyright infringement. Neither does downloading and playing the game.