Confrontation is the ninth level of Episode 3 and the final level overall. It is the battle with Dr. Riptide and takes place in a rather cramped area. The small area means avoiding Riptide's missiles can be difficult. At the right of the level is a door that serves no apparent purpose, other than that story-wise it is the area which Nick appears to leave through. After the boss is defeated, Nick captures Riptide.
At the far right of the level are two barrels. Destroy the barrels as quickly as possible and grab the goodies.