Puzzles. Solving them is extremely fun, and supposedly they have a heart. Some puzzles are so damn dangerous that you could die if you mess up. The word "puzzles" is mentioned a lot of times in this show. It gets quite annoying.
Story: The main character is a fuckin' smart-ass, and he's nicknamed Einstein. He is put into a situation where he has to solve super-duper-mega-pooper dangerous puzzles for absolutely No. MothaFucking. Reason. The show is about puzzle solving, yet 80% of the god damned episode we see the main characters in school. Or doing something crappy unrelated to puzzles. And when the show gets to the "Puzzles", they're solved so fking fast, and I mean DBZ fast. We get no time to think about it, making the whole show a regular high school Drama/Comedy anime. At some times they'll even put in music trying to make it seem "exciting", but they fail hard.
With an added "Plus" they say something about "ruining/destroying the world" or SOME crap like that. BUT, WHAT THE FUCK ARE PUZZLES GOING TO DO TO THE WORLD? Do they EXPECT every SINGLE FUCKING PERSON IN THE WORLD TO TRY THESE DANGEROUS PUZZLES (having the knowledge that they could die if they fail) THAT THEY SPEND BILLIONS ON JUST TO CREATE? DAFAQ IS WRONG WITH THEM?
What I don't understand is why this is a "mystery" show when there IS NO MYSTERY. The protagonist solves everything in a flash. We don't even see his thought process, IS HE A FUCKING MACHINE? Detective Conan actually gives us clues, time, and information, and enough of it for US to even solve, where this show completely lacks in.
YUGIOH! Yes. A Golden armband is given to the protagonist (Diamon Kaito), which unleashes his inner "Yugi", making him 100 times more smarter and helps him do the impossible. His eye colour also changes, even though there's no point to it. (Use sharingan Kaito!)
Art: The art is shitty. It's what CARTOONS use. Calling an anime a cartoon is mean. BUT HELL YEA THIS SHOW DESERVES IT! STUPID CARTOON!
Sound: The opening was decent, and there's nothing terrible about the character voices.
Character: Typical shounen characters. A sarcastic, "knows everything and wins all the time" main character. A tsundere female who's just there to piss me off. A guy who thinks of the main character as a rival and always tries to be better than him. And another girl who.. wait my bad, a Guy who dresses, talks, acts, like a girl. Guess his name... Anna. What the hell is wrong with the producers? Isn't this for children? Are they encouraging children to do Cross-dressing? My bad it's just Japan.
Enjoyment: I don't like unfinished business so I'll be watching this till the end. But it sucks big hairy Great Golden Ape's uknowut.
Overall: A poor attempt of making an "Intelligent, mysterious" show.