Undertale, the game itself is not brilliant if it's programmed to do what it does since all it is is following coded directions with no struggle because the inanimate object isn't capable of feeling and a mind.
An object can't be programmed to be brilliant because it lacks the mind, even if the coding is really complex, because a code does not have free decision making, they are programmed to make certain decisions under certain circumstances. For example, undertale starts off the exact same way with the story line. And yes undertale may respond to almost any situation, but that doesn't mean it's brilliant since it depends on the flexibility of the response to every situation, if they respond the same way to every situation, then it's not brilliant, especially since it can't be. My opponent has not refuted my mind argument, and I'm not sure if pro said Toby Fox developed it and since he has a mind the game can be brilliant, but that has nothing to do with the game itself being brilliant.
A simulation is not same as actually thinking with a mind. An airplane simulator lacks the exact things to make it a mind. And no, code has not been shown to make a computer to think for itself, so extend everything.