that's so cool, seriously. good job smoothening the borders of the two. i know i haven't been very helpful with this piece here before, so i'll try again :). the lighting on the nose of the... erm.. fruit seems like it's using a different lightsource than the worm does (does one _use_ a lightsource? mhh, anyways..), making it look like it's two separate colors (orange and red) rather than being shaded. and there's some slight aa-jaggies in the lower right part of the leaf. if you still got a color left in those 8x8 tiles maybe use the second-darkest green you have there on the main fruit to smoothen that.
and where you're already at it, why not post some other fun experiments. like the hexels :)
edit: yay for spellcheck :)