Samus looks good, but the gunship feels too big.
Could it be scaled down?
It was loooong work to bring it over from Super Metroid (means pixel by pixel, making it function with NES's limited palette, assigning enough tiles to it (almost an entire CHR page,...). Samus is quite a lot bigger in Super Metroid, so it makes for another proportion.
I have no plan to change the Spaceship Sprite, sorry. I would have to do it from scratch and had to get rid of this piece of work, which I'm not gonna do, but i see where you're coming from.