ColorMe Contest! Entry - Space Alien "Grot"

Rules were pretty simple, you can add things, but could not change the basic shape of the image, so this is what I ended up with after an hour or two with my Ipad pro and Apple pencil. I call this alien vermin "Grot". The Grot are a micro-sized alien invisible to the human eye. If a human has the misfortune of encountering a Grot they will be none the wiser, for the Grot travel through the skin like radiation and silently multiple before taking over the unfortunate humans brain. The Grot assume control of the human body and mind in a short incubation period of 3-5 business days, leaving the human host a mindless slave to consumerism and debt extending the expiry date of the human an additional one hundred years, and without any complaining.

My previous drawings:

My Chihuahua Chico