Alien Modelling

As a part of this module we are asked to complete a series of exercises, which we then learn how to model, rig, texture and animate a character. We are asked to create an alien character. Here is the finished model that I managed to come up with. I used the reference images provided in order to create it. I simply started off with a cube, I then extruded up and outwards to make it the right size. I then moved the vertices to give it the shape.
These are the images we were given.

This is the model I managed to create.