Nice, love the different shapes of the rocks and the creases on his briefs. His wide-eyed stare is slightly distracting - he's showing off a lot of the whites of his eyes. But, I guess that's a stylization thing.
I like the grass a lot too - it's nice and detailed, but still simple enough to not be distracting. The subtle black pixels under the top layer of the grass lend it some nice definition.
I see "H1" and some funky rock formations underneath. Is that it? 
Nice rocks. 
I prefer the right one, difference is in grass. :)
And I know right, everyone I shown this gave up on searching for the message, yet it's so easy ! :D
nicely done. can't find the hidden message though -_-; ... do you prefer the left or the right image? is there a reason you posted both of them?
Thanks a lot :)
Yeah the eye balls showing much was inteded