I've seen plenty of anime in which someone challenges another to a game in order to gain status, or points from another. To name a few. Baka and Test, Classroom of the Elite, Kakegurui, even the good old Yu-Gi-Oh. And I usually like them all. However, I feel this one was poorly done.
It started out good. You got new student who becomes top of the class by obtaining the liar star, by accidentally beating the best girl on the island in a game he had no idea how to play. Then has to lie about being the best to keep her secret, while also getting an advantage to figure out his own reason for why he went to the island. The art style was great. I really like how the characters look. Even the music was alright.
Where it fell for me was as the story progressed they introduced new games, which normally isn't an issue, but I felt they were explained poorly. I legit had no idea how to the last two games were played, but I think I understood a few of the other ones as the story went on. Though I also feel after they explained some of the rules in some of those games. They're just completely ignored as the game plays out. And then you have these abilities which there are a wide variety of them. Pretty much you can use them to win a game, as long as you prepare those abilities in advance, almost like making a small unique deck in a TCG. Throughout those games the Heart of the cards guided him to victory at times. Heart of the cards being hackers that messes with the programing of the game giving our MC an advantage in things, and just claims it as his abilities. It wouldn't be called Liar Liar if he only had one lie lol. Overall: Yes there are better game centered anime out there, but I think it still has potential, possibly. If they make a S2 I think the rules gotta be more understanding, and followed more