brawny is gr8
nice ensemble pic, couple things i can't help notice though - the shading seems to be there for no reason, as you seem to be using it for purely detail and not to convey the idea that the characters are stood near a light source. for example the shading on some characters is mostly on the right, and the shading on others is mostly on the left, and on the kangaroo the shading's absolutely everywhere
the best thing to do is picture an imaginary 'sun' somewhere in your pic (bottom, top, right, left, centre, doesn't matter!) and then figure out where the characters' bodies would cast shadows from there. It helps them appear a lot more '3D' if you pull it off right. I used to have this problem with 'detail shading' for ages, but once you figure out the whole light source thing, shit gets awesome.
The bg, despite being gold and relating to the theme, is really murky and contrasts heavily against the liveliness of these characters - contrast can be good, but this is in a bad way unfortunately. Maybe a sort of 'Sunburst' of different gold-themed hues against a pure black background would work better
All that aside, these are some really nice characters and holy shit i just noticed the shark in the middle there lmao