Colors don't fit in that well. Black and white version in your sig is a bit better. Effects aren't that nice. Doesn't look like you did much. Background is pretty plain. Good that your trying to improve on C4D's, but there's alot more you can do with them. You also need to keep in mind the colors. Find ones that work well together. Add flow.
The left side is too bright and empty. It hurts it too much, it's very negative. Text sucks and so does the color, try some different fonts. The effects are bad and there is negative flow, try to keep colors that go well together and move the effects around so it creates flow. Huge lack of depth too, mostly because it's a cartoon. You shouldn't do cartoons often. I won't CnC the B&W sig because I don't like them.