Wow these monsters look so scary and also interesting design-wise 😄
You work with pencil and ink, which is actually quite a nice combination. Maybe I would suggest to only use the pencil in specific areas (e.g only for shadows), like you did with day 23, bc otherwise it may turn out a bit muddy and unreadable (e.g. day 16 + day 4).
Besides that the poses, design and mood of your pieces are top notch 👍