You won't encounter many problems working your way through this level as there are no real challenges. Once you reach the end of the level you will face three stages of the boss.
#1 - Psyphon will first start attacking you from the roof of another building. The idea is to lure his attacks towards the generator on the left. Once the fence is destroyed use Humungousaur to destroy the generator. This will cause the pylon to fall and you can cross over to the other building.
#2 - Now you have crossed to the other roof you will be subjected to another cutscene. Once this has ended I would advise you to transform into Spidermonkey. His speed will come in handy. After a few attacks you will start to see targets appear on the floor. Run around Psyphon and avoid these. Do this till they disappear and once they have attack him as much as you can. Simply repeat this process untill you have drained all his energy.
#3 - Now onto the final part. Psyphon will make the billboard come to life and you will be attacked by a giant Mr. Smootie Cup. I decided to stick with Spidermonkey but I have been informed Cannonbolt is just as good. Simply run circles around Mr. Smootie Cup until you see a window of opportunity. Now go in for the attack. If you start to loose too much energy simply break up a few objects that are scattered around the roof to top up. Repeat this process and he will soon go down.