These are great! Your technique looks really good, as I'm sure you know.
It might just be that I'm lacking context, but the bone in ooze (?) and purple sludge are hard to interpret. I also feel like the rightmost two sprites on the third row are meant to be food items, but then again, they're right next to the magic green dog butt (??), so maybe they're supposed to look fecal?
The sel-out on the carrots also doesn't match the unbroken outline on the other sprites.
I'm jealous of the way you did the fourth row. That eye of ender looks amazing!