Awesome looks! But yeah, I would imagine the playability of it would be near nil... I'm not sure if you know about the two 'egg mechs' on Brickshelf but they look similar in how the limbs are put together... I made a pair of my own based-off the Bricklink designs and comparing them to yours, this one probably holds-up about as well as they do, which is to day they collapse into rubble at any sudden movement.
But it looks awesome, right?!
"Re-go no kaijuu wa hoshi kara yo"
"Los monstruos de los Legos de las estrellas!"
"Lego monsters from the stars!"