Needs work.
I'm not a fan of the show, so I lack any inside knowledge of the characters, but giving each of them different abilities of shooting, teleporting, ETC would add some depth to gameplay. A build up to the "bosses" would have also been a nice touch. Putting a sidescrolling element or platforming bit into the stage before the big fight could add more property to the short game. Graphics... were okay. The background was nice and the characters moved fluidly but everything seemed too distant, making me feel like I had to squint to see everything. Moving a little closer or different animation should fix the problem.
Overall, not the best game. A good first one though!