Graphics: 4/5 For coming out in 1989, the game really doesn't look all that bad. Sure the game looks really cheesy and the animation and movements aren't realistic, but give the game a break. It looks pretty good, even 18 years later.
Sound: 4.25/5 To be honest, I don't really pay all that much attention to the sound in this game. But the Teenage Mutant Ninja Turtles theme song is so good, it deserves a decent rating.
Control: 3.75/5 A little bland and simple - and that isn't neccesarily a good or bad thing in some cases, but for this game, it isn't good. All you do is move with the analog stick, and press A to jump, and X to attack, or B+X at the same time to do your "special attack", which can be done at any time, as long as you want. I recommend using it, because your opponents will die a lot faster.
Fun: 3.5/5 Teenage Mutant Ninja Turtles is what it is - a fun game to run through a couple times, and then forget about. There is co-op mode, and co-op achievements, but that's all there really is. There's leader boards too, but whoop-de-doo. This game is really only for someone who remembers playing it back in the day or has any interest in the Ninja Turtles. If you don't, and you're an achievement whore, this game still isn't for you. This game is not easy to get achievements for. Overall, Teenage Mutant Ninja Turtles is really just a game to bring back memories at the arcade.
Achievement Difficulty: 9/10
I've only had this game for 2 days, but even so, the achievements are always going to be hard. Achievements that ask you to not get burned by a flame thrower by a boss, frozen by a trap, and not getting turned into a normal turtle while facing Shredder are all difficult. Unless you play the game twice through on co-op and let your buddy get it the one time, and have him let you get them the second time, it will be very hard to get the achievements in this game, since you can't skip certain chapters to play certain bosses. I'd say that someone who devotes about an hour to the game will only get about 30-50 achievement points - and a person playing without co-op may only get about 30-50 if they play the game several times through. ( The game only takes maybe 30-45 minutes to beat )