From a graphics standpoint, the only advice I might offer is to alter the hue color of the Twilight art just a bit to make it blend better with the vibrant ACNL colors behind it!
And maybe move the quote down JUST a little bit! So that it's not so squished against the text above it!
Other than that, it's easy on the eyes and a very unique and wonderful signature, great to express your devotion for the things you love!