I've realized how much I have to work on proportions. Just like the other exercises, I am trying to do it in the shortest time possible, in this case the one that has taken me the longest is the girl, which was 15 minutes. 

My first attempt with paper (I tried the boots a few days ago with procreate). I tried to make the sketches using the least amount of time possible, two minutes for the snail, five minutes for the camel and ten minutes for the skull. I only used HB for the basic shapes and 2B for the finishing lines.

I tried with the boots, I still have to do the snail

I'm trying with Procreate. What do you think guys?