Good stuff but...
The only thing that bugged me just a little bit was the big monster's face makeup (or scar, whatever it is) kept switching sides. Heck, even in your icon, it's on his left side, but the final shot, it's on his right. I understand to save time you just mirror images, but it's small details like that that can take away from a piece. To me, it's like the water in Iron Man not moving an inch when he flies at Mach 2 over it.