I think you tried to overdo it. The cockpit is fine, but you tried to make it massive without having the parts to do it. I see you have some Bionicle limbs, try to attach some directly to the cockpit, it's way easier and the result usually looks cool. Keep brickin'!
Huh...This reminds me a lot of the first couple of mechs I built. I can tell you don't have all the parts you want, but stick with building mechs. Once you get the parts you need you'll see how much improvement you can make, and after getting the right parts, its just refining you're style. But Keep it up, I'd like to see more builds like this.
Obviously, you built this while drawing from a limited inventory, but you has to build with the parts you have, not the parts you want, so well done! I like the tail that helps you stand on rough terrain (like carpet). Your photographs are all well lit and focused. I recommend you try a re-build, and this time make the mec a little smaller. You might be surprised by the results. Attack!