A larger diameter nozzle is recommended (0.6mm or greater) as some of the surfaces approach a shallow angle meaning that the perimeters may have trouble properly sticking to the layer below.
You can up the creepy factor by painting the eye sockets white and “pupils” black.
You can also find the “solid” two piece version here:
https://www.printables.com/model/289453-pumpkin-whose-eyes-follow-you-two-piece-version
Or all my Halloween designs:
https://www.printables.com/social/153445-lothar/collections/291030
UPDATE: STL file added
The author hasn't provided the model origin yet.