This is a good idea, but the \"Joint\" block idea needs a bit more detail in my opinion, for example, there could be \"Wrist Joint Blocks\" at which point you mechs hand could rotate, being used via the up and down arrow key to rotate the arm vertically, and A grasper joint, for a hand that could grab individual blocks, and put them down in a differant position. Elbow joints could be even more useful, because you would be able to right yourself should you fall. Knee joints for walking could be used via the directional keys, and ankle joints for extended mobility, being able to climb up hills ect. Neck joints will be the last joint I will mention, being used via the arrow keys, left and right to turn the head sideways for improved visability. Tools could be used by these mechs to make mining ect. more realistic, all of this is not as such nessissery, but would be nice in later game play.
Thanks for reading, Tilbo
EDIT the controls may be a bit hard, so you guys can put down what you would like under neath