Yes, Donatello was the key player that just took motherf&*^kers out.
The seaweed IS the most annoying thing, nobody is actually good at it, it is supposed to piss you off. This is probably why Ebert, who was in his late 40's at the time, and having a mid-life crisis, got depressed.
The only part of TMNT I sucked balls at was the stupid goddamn seaweed of death. The rest of the game was pretty frigging easy. Donatello + Bludgeon everything = success.