This is pretty awesome, for some reason I totally missed it, might've even vote for it :( Well good jo anyway, but there were loads of good entries this time :o

 votee, :)

 I like it a lot!  That face you've hid in there is genius, and you've done a great job with restricted pallets.

Thanks mates !

Pumpkinbot : indirectly, that's a human face

Manu : thanks ! I don't find the textures you evoke similar, i was more afraid about the water and the storm textures in fact, but nobody mentionned it, so I hope it's fixed now...

Great concept, greatly executed.

I like how there is stuff to explore and discover. Lovely colors too.

Maybe the fire and water textures are a bit too similar.

 Upper left looks like the start of some cool desert landscape in a C64 game. Overall I like best the two with more limited palettes; you used them really well.

Ah. Okay, then. Carry on.

...Carry on, my wayward son. There'll be peace when you are done...

Well rendered!  I'm especially digging the water.

 Nope. Someone even asked that.

Okay, but I think the challenge calls for a human face. :/

 The two bottom ones are great (As I'm sure the top would be if you had more colours to use :P )

 comme je disais sur RP ! bravo, dommage pour la terre qui aurait pu etre mieux eleboré mais bon...regles du concours 

Maybe not original at all, but it came out pretty well! I liked specially the AIR part.