I was certain I had gone mad. My comment is for the "Hamtaro" sig, but not the alternates that come and go.
~This Poster was unaware of Hamtaro prior to having beheld its image. I learned more, and thus, a small bit of ignorance was washed away, and knowledge has been gained. All is well.~
Is that home made? I'd play with the angle of the engine flares, and give them some opacity and/or different blending modes. And I'd color the ships a bit, their lightning doesn't match the scenery. And a border, even if it's just a 3px solid black one could never hurt.