1) Make the stuff the pilot will use
2) make the pilot
3) make the cockpit thing that explodes
4) make the armor for the mech
5)Make the mech an actor, and all the armor attachables, for how it works, read the code for the dreadnought.
6) make the mech actor gib into the cockpit
7) add lua to the mech so that when it is at 0 or less health, that it WILL gib, into the cockpit
add lua to the cockpit to make it A) not die B) explode C)create the pilot with stuff and D) make it not kill the pilot when it explodes.

This is what you must do, And as of yet if you actually put your heart and back into it, and maybe if you dont feel capable get someone to make the lua (because Its allot harder than just fiddling with variables).

Also as I voted, if you want I can make sounds, but don't ask me to, until your at a point that you just need sounds and glows and wounds, and all the simple stuff you can add at the end.

If you dont like it, make your own sprites then.