Hmm... If I recall, the FLCL robot in the show was much more angular...Well, not angular like "/\/\/\," but an organic kind of angular...
Whatever.
Who's the shiny red-haired chick? Looks loyal to the reference, but, as C.A.G. stated, it's very pillowy. It could also benefit from using alot less colors and more contrast.
Good work so far, though and welcome to the forums!