Full art:

Description and eye:

Top: “A monster that eats lots of candy”
Bottom: “Since it has only one eye, I’m drawing it somewhat large”

Pupil detail:

“Everything on its sight is seen as candy”

Head:

“It’s not a bolt, but because I wanted to make the design feel familiar, I pierced candy through its head”

Other monsters:

“All monsters that bring candy are welcome”

Eating candy:

Ween: “Candy! Candy! Delicious! *Munching noises*”
Top-right: “I want to see its eating animation so badly”
Right: “Can eat endlessly”
Bottom-right: “Most definitely is not candy”
Left: “I want to eat until I’m full (not gonna happen)”

Bones:

“Bones lie on its path”

Source.