Very Menacing, I like it!
I feel as though the robot is on top of the background instead of in it though (mostly the front paws, the back row paws look fine thanks to the blur). This may be fix if the mountain and land can overlap a little of the robot's paw or the color of robot (preferably the leg area) is slightly more closer with the background color or the background color (the footing area) is more influence by the robot.
Btw I think the link isn't working (ven when I remove 3 spaces)
I really love the amount of detail you put in it :D