Thanks, guys!

Glad you like it.

Some minor adjustments to the tiles. I also tried adding another layer, since I thought it was a good idea, but I think it's difficult to pull off without making it too cluttered, at least with so few colors to work with.

Made the glowing moth more moth-like and made some more death animations. Not sure what speed to go for, though.
And, yeah, the worm monsters look pretty dull. I tried adding some yellow or white highlights to begin with, but thought they were too harsh, so I ended up settling for the dry, leathery look. Darkening the shadows would mean using gray or dark blue, and that wouldn't really work, either.
The shading is what bothers me the most about the worms at the moment. A top-left light source doesn't work when flipping them. The mud man has his lantern hand, and the glowing moth glows, and it's not really noticeable with the rest since they have other details like arms and such that can't really be shaded much and still be readable. I tried changing the shading on the smaller worms a bit. I'm not that worried about the big one since it's not going to be moving much. It'll just lay eggs.