Why would somone use gradients a basis for shading for something that's meant to be for an 8-bit pallette? That's asking for bad-looking colour loss. Can people just complete the rest of the pic with the 8-bit method, it saves so much time messing around in the end. Sketching on paper is fine, but when it reaches the colouring stage, some thoughts about limited colours should be applied. Do people really have that much of a problem doing pixelart?

Also, pls save in PNG again after converting to bmp. BMP is large. There's even some programs/online utilities out there that can reduce the colours in PNGs, probably much better than how BMP does automatically.

Another nitpick is that is looks pretty stiff. It tries to look dynamic, though ends up looking awkward, because it doesn't execute anatomy very well (yes, it helps with cartoons at times) as well as lacking a proper line of motion. They don't meld well with the background either, it feels thrown in, because it completely ignores the perspective between where the characters are placed. Spaz appears to be a giant, and I don't have a clear idea of what he's doing. Jazz and Lori's hands appear to be the same, even though Jazzes are actually bigger (and for a good reason, male hands are bigger). The way the hands are drawn doesn't look like they're grabbing onto anything, probably because I don't see any knuckles implied, they just...get thinner. I could go into more critique, but I think that's enough for now. I've probably used a bunch of terms that are obscure to many.

Sorry for going into evil art-critic mode. I am also critical of my own work.