A final 2D-bug cookie tutorial.......

CATERPILLARS!

Use a long triangular-shaped cutter for the body of the caterpillar

(I used a trimmed version of a surfboard cutter.)
Decorate the caterpillar body as desired.

  You will also need a smaller circle cookie for the head (I used a 1 1/2" diameter).

The size of the circle will depend on the size of the caterpillar body.

Outline and flood the circle in green 10-second glaze.

While the glaze is still wet, put two large green candy pearls in place for the eyes
(or you can use white pearls).

Add a dot of black glaze to each "eyeball" for the pupil.

And then add a large black candy pearl for the nose.

Allow both cookies to dry overnight.

And then it is time for assembly.

Add some glaze to the back of the "head" cookie. 

(Make sure the caterpillar's face is in the right direction before adding the "glue".)