Teenage Mutant Ninja Turtles is full of enjoyable action scenes. Are they sprinkled with sillier moments? Yes, but that's part of the fun! The movie was made with kids in mind, and those lighthearted and goofy parts in the fights can also serve as a nice reminder that these
mutated ninjas are still teenagers who have a lot of growing up to do. What's really important is that the levity and silliness doesn't overshadow everything else. As you probably already know, that can't be said for the sequel, Teenage Mutant Ninja Turtles II: The Secret of the Ooze.
Yes, there's stuff in the 1990 movie like Donatello momentarily defeating a ninja by spitting water in his eye, but that doesn't take away from things like Raphael attempting to hold his own against overwhelming odds, Casey Jones taking on the Foot, or the Heroes in a Half Shell finally confronting Shredder on a rooftop, just like they did in the very first comic. Picking apart and criticizing the fights would be easy, but at the end of the day, the action scenes are still a whole lot of fun; they're a good mesh of comedic material and solid choreography from people in practical costumes. Is it up there with The Raid? Obviously not. But is it entertaining? Absolutely.