Gave up on this after getting to the final boss. Combat is reasonably fun against most of the regular enemies, but basically all the bosses are essentially uncomboable. With the surprising exception of Shredder in the penultimate level, they basically rotate through simple invulnerable-vulnerable phases, with generally unengaging attack patterns. Only a few are interesting in their own right. Most are boring, made aggravating by the presence of adds.

Strongest point in its favour is the story mode basically acting as a chapter select for the arcade mode. That's undermined by including a level system. "Level your favourite turtles up to level 10 so you get full access to supermoves" oh yeah no thank you.

At least it's pretty.