Help with project

Hello I am new to the blender software and I am trying to use it for purposes of designing a psychology study. I am currently trying to create a four legged spider like creature that moves and I keep on hitting snags especially when it comes to using armatures and getting them to move in the right way. I think the vertex groups are not adjusted properly and i cant figure out how to tweak them so as to fix the problem. Can anybody help me please I have attached the file I have so far to maybe you could tell me what i have done wrong.

Any help would be greatly appreciated


spider thing (625 KB)