This project is really becoming something impressive!
I have one suggestion, why don't you make the hud black? Like most 8bit games,I think it would be more pleasing to the eye.
Thanks for your dedication and hard work!
Thank you for your message : a lot of things can still change before the release, of course, and some people have expressed a preference toward black or white.
As for me, I actually like white a little bit more, since the game is inspired of a cartoon, and a lot of backgrounds are white or light.
Granted, the NES version has black HUD, but it also (and contrary to the GB counterpart) is a lot darker in its levels and such.
Plus, some people have mentioned white makes it easier to read (see Kirby DX, for example, which I think is one of the epitomes of GBC hacks, and has white HUD).
If I were to go for black, I'd have to make more changes than meet the eye, as the portraits of Buster and Plucky would have to be redrawned (too many colors, don't forget white is a color too

) : that's not impossible, and I've done it in several occasions already (mainly Buster and Babs' sprites), but I try not to "alter" the original's artwork (which is pretty great in my opinion) too much.
Anyway, I'm planning on releasing some video for Xmas Eve, but don't take my word on it!
Have a nice day!