Here is my "Work In Progress" for a
caterpillar mech. I'm struggling a bit with drawing the upper thigh (so it's removed from the current animation).

The mech will tranform from a caterpillar form:

This sprite is for a game I'm working on... a freeware retro platform shooter in the style of early nineties shareware games from Apogee/Epic/ID. (Duke Nukem, Halloween Harry, etc.)
My problems right now:
1. Drawing a good thigh that "looks right" with the rest of the mech. Not too large (so that it makes the lower boot seem small) and not so small that it doesn't appear to hold his weight.
2. Keeping the mech "near" this height. If the mech gets too much taller, then the rifle fires bullets at a height over the main character sprite's head. (I know... bad planning on my part).
Advice and C+C welcome! Thanks!