Another thing I did (to help me decide how many ‘elements’ I wanted my characters to be split into) was to start clicking and colouring. This was to test whether the characters were simplified properly, and changed in one click e.g. both eyes in one click, arms in separate clicks from the body, teeth in one click, mouth in another click etc.
This also helped me notice how I had oversimplified some of my shapes. For example this alien’s pupils ended up changing colour with the rest of the body. So I had to cut the pupil from the body and make it it’s own shape ⌄