The controls for this game are a terrible joke, the camera pans in different directions and you have absolutely no control over it half the time. You may be able to "look around" from time to time, but it'll easily be redirected in combat, or when you get into areas where it forces you into one specific view point. Combat was somewhat boring, and very much a button-mash experience. Combos of click-click-click-other click weren't intuitive. Inventory was difficult to shuffle through in combat when you had more than a few items. Two types of shuriken, two bombs, and the specialty weapons all filling the same slot and only one key in one direction to alternate through meant I was generally ignoring most of my inventory. Ideally, one could set each turtle with a different item, but if I wanted to toss a bomb in one direction and eat a pizza before going to a specialty weapon (as an example), I'd be bouncing around endlessly. In most cases, I would have often preferred NOT having the other three turtles present throughout the game as they would get in the way. I had many experiences with them blocking doorways or alleys that forced me to switch to a different character in order to move beyond.
There's a point in the game where you're running an obstacle course. When your brothers fall behind, you'll get a puff from a smoke bomb that has the game replacing them next to you (this was my experience, at least). When trying to make it through the course, I would continually get smoke bombed and blockaded by another turtle. In this instance that one or two second stop meant failure, and became frustrating.
TMNT is a piece of my childhood that I love, and I've played the games as far back as NES/Gameboy. This one was a real let down in terms of performance. This could have been a fantastic sandbox, but the inability to even Jump let me know I probably wasn't going to enjoy the game. From the lackluster combat, poor camera, continual timer delays witholding zone progression, and being stuck within the geometry often, I couldn't continue playing the game.
No amount of nostalgia could win this for me. At best, I'd give it 4/10.