Reminds me of that episode of Dexter's Lab from when I was younger. There was a guy made of magma underground and all he wanted to do was sleep, but earth is too noisy so he got mad and tried to kill everybody.
Nicely drawn, mate. Maybe bring in some minor pattern/texture with, say an orange on the magma monster and it'll be way clearer, but it's super strong as is. Best of luck, this is pretty ace all over.