Wow. It was actually good.
Graphics: Lillium parody. Compared to other Lillium Parodies, this one made good use of scrolling backgrounds, but the art not inspired by Lillium (basically the author's portrait) looks pretty bad. You can see all the usual mistakes beginners make when drawing, like thebuldgy, horizontal almond eyes, the skewed head, the exaggerated lips, the nose made out of straight lines. Get a "how to draw (your favorite cartoon character) book from the library, practice from it, and start building your own style off of what you learn from that. You need to learn how to get a feel for the facial features should look in proportion to each other, and which lines are better left implied or hinted at instead of actually drawing them. And don't even think about hiding behind the "I can draw better than this, I was making fun of the anime style" card. In anime, eyes are too big, nose is to small, mouth flips between the two, but basic principles of anatomy are still kept track of by the artist. Your head looks like your skull has been crushed and the skin is just limply hanging there, like a sack of potatoes. No offense. I'm sure you'll get better at it if you start trying to learn from what other artists know. HOW TO DRAW books are one way you can do that, cheaply and easily at your age. If you were older, I'd say take some drawing and anatomy classes in college or recommend some more advanced books. Most people who draw like this do so in kindergarten, with crayon, and then most of the kids quit, while one or two keep drawing and eventually get good. I hope you don't quit. That you're still trying at age 13 says something about you. Keep it up. Just don't get lazy and think you have nothing left to learn.
Style: He takes the Lillium thing, and makes that Shadow play by his rules. The shadow does so, too, with a certian ammount of flair. You really have to respect that this Lillium Parody isn't just copying Lillium, it's also improvising two other styles, one of which (The shadow's rap,) is well-executed even though GoldenCat doesn't like or respect the style. If only he'd had the balls to make fun of hip-hop as well as emo, this could have been a hillarious rip where the player gets to choose the ending. As it is, the "rap wins everything" ending just leaves the average viewer shaking his head and chuckling "Sure, kid. You're reeeeeeal badass. Whatever."
Sound: Three music tracks, of varoius genres, all used to good effect. The two non-Lillium tracks are well-chosen, IMHO. They perfectly capture the mood of the two rap combatants without being TOTALLY annoying to somebody who doesn't like either genre. Record scartch wasn't bad, either.
Violence: The shadow cuts himself. REAL FAKE BLOOD! OMG!
Interactivity: Movie.
Humor: I think the umbrella suddenly appearing in his hand was the funniest part. The "Emo sucks" jokes were okay, but kinda predictable. The letters EMO scrawled into the shadow were amusing. I almost didn't notice them at first, thinking it to be his mouth until the screen scrolled up.
Overall: INFINITELY better than London Sucks, which didn't have a point and just kinda sat there being not funny, and not especially cruel either. Could good old-fashioned parody be Goldencatilium's niche? We'll see.