Pixel Demon Slug Sprite

Pixel demon slug.

32 x 32 sprite

sprite sheet is 32 x 128

This is my first pixel-art sprite. I'm going to be doing more and focusing towards sprites for pixel games. I obviously have some more learning to do in the creation of pixel art, but I hope I can keep progressing. 

Let me know what you think and how I could have improved on this sprite sheet.