Raphael is by far the fastest turtle, but he also has the weakest attack. He is used for the majority of the game, but in the boss-heavy final levels he is replaced with Michelangelo, who has a stronger special attack.
The special attacks consume health, but you can continue using them even with near-depleted life gauge.

This movie improves the previous one by over 3 minutes thanks to using two turtles and strategic approach to score and health management.