I'm no imaging expert by any means, but the two items you pointed out seem natural on close inspection, at least to me.
The lower left hand group seems to be an illusion caused by the fracturing of the rock "plate" sitting flat. The area in the upper right corner that resemble humanoids is just a case of rocks aligning to form that, as close inspection seems to put them at different distances from the camera; not to mention, it would seem that at that distance, they would be about 30 feet tall.
Just my inexpert look at it.



























