Creature Help

[Toastfighter]

This would be my first time making a creature in a way like this (the first presentable one at least) and I would really like help on improving. The creature must be assembled though, as it uses different interchangeable parts, but I outlined each box so it should be extremely easy to do if you wish to. I would appreciate any input at all on improving my skills in any way.

P.S. The white arrows show the parts that would be animated.