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The biggest problem is the nasty pixely white edges on everything.
I'm not sure, maybe that's the look you were going for, but it looks like little kid handwriting. The paw-print looks pretty good though (minus the aforementioned edge.) The choice of color scheme seems a bit odd, though I could see it possibly working, again depending on what you are going for.
I think a vector based art program would give you better results, if you have one available. Something like Illustrator. I'm pretty sure there are free programs that do that kind of thing if you don't have Illustrator available.