Under intellectual property law, is it permissible to create a version of an out-of-print board game that is protected by copyright, but not by patent, by changing its design elements (cards, game pieces, packaging, name, logo, and symbols) while retaining the original game's rules and only writing them in other words, and advertising the game as having the same concept as the original?
Example: The new game is called "FlowerPoly" and is a copycat version of the game "Monopoly". In FlowerPoly, instead of estates and streets, there are lands and farms, and instead of buying a hotel or a house, the player buys a Nature Reserve. The currency used in the game is Nature-points instead of dollar bills. Despite these changes, the gameplay remains exactly the same and players who have played both games would recognize the similarities immediately.
Note: The original game does not hold a patent. I understand that copyright protection applies only to the design and names, not the mechanics, so using a different design should be acceptable. However, I seek clarification on whether claiming the game is similar to the original would infringe on the original game's intellectual property. (Maybe Trademark? because i am connecting it to the original game)
Edit: To clarify my main question is whether claiming the copycat is similar to the original would infringe on the original game's intellectual property.