Awesome as a videogame background, nice details!
Well, I edited again, so I think it was beautiful pixel-art, and became the face of my style. Thanks to everyone who helped. Thanks Jinn
For me its color was the issue that most pleased me far, I'll use. Thanks!
Well, if everyone else is making a color-edit then I'm gonna do one too,darn it! :D
Also got rid of some stray and redundant colors. Count is now 10.
I have to say, those two small bright spots make it really hard not to see that area as a limp squid. 
This image is really kind of Henk Nieborg-ish, aside from the fact that you use only one color ramp. Very interesting and polished style. 
he said he was going for my edit =D hope he finishes it.
The possibilities are unlimited.
I suggest you to just play with the colors a bit (there are just a few, so you can do it manually). I would stick to changing the hues in one direction at first (the classic example: the darker the shade the more magenta it is). It is simple enough, but can achieve a lot.
Oh, and I noticed one or two really unexploited colors while doing the edits.
And I just have to add that the subtle dithering looks really professional.
Guys. Let's stop calling each other idiots and talk about art, shall we? 
The layers and textures are fantastic, and if not for the monochrome I'd say the same for the colors. I like the blue theme, but the slight hue variations that Jinn and Jetrel showed examples of really add a lot to the effect. Also as a3um mentioned, that little rock in the center is way too dark for where it is, it should either be lighter or just taken out. I didn't notice it at first but now that I see it I can't take my eye off it. Overall really great piece, but yeah I highly suggest shifting the hues a little bit.
Jinn's colors are pretty nice.
Also: http://imgur.com/VMIV2
Rique - "you are the idiot here, you don't accept critiques about your piece" Second, I do, but your critique is nonsense and pointless. Just stop bothering the members.
The idiot here are you, who dont accept bad words about your piece.
Rique , you are a idiot !! Zoa , tá muito bom isso ai vei
@Rique - you are just idiot. My edit was to help I don't even care about your oppinion, no one here does btw. Stop bothering members.
I think this is not prohibited. I only ask, does not oblige, a favorite if you really like, if not, don't need. I'm not doing anything wrong, I would be wrong if you were using fakes.
this guy ask me all the time to vote and fave...unfair.
I like it , nice evolution
ಬಿಚ್ ಆಫ್ ಬಾಯ್ ಸನ್ ಅಭಿನಂದನೆಗಳು
Merez Ricardo punk bitch
Bye
A bit of colour mixing would give this so much more punch. It's nice pixel work but tweaking the palette could make all the difference.
Your use of contrast [and lack of contrast] conveys depth in a spot-on way. Very well done!
my my that's pretty good, the things which joe and angel pointed out are somewhat to think about, they are really hitting the nail. You could also increase the glowing light from the shrooms in the front to add a bit more light and make the foreground more interesting.
The perspective of the water source which is flowing over the middle-ground rocks is a bit distracting, there is somewhat of with the pillar/stallagmite and distance which hurts the depth.
also good luck =)
Você está evoluindo bem rápido, rapaz. Só acho que você poderia dar uma encorpada nessas cores: http://i.imgur.com/bMW3u.png
Friends, I do not know how to exit the "monochrome", I can only work so I can not make the color transition? Could you help me? Thanks to all who commented.
esta muito bom ricardo, você está melhorando cada vez mais, gostei das cores também ;)
Very moody and clear picture, good use of techniques!
Good luck in the competition by the way!
It looks really good. But I must agree with the others that it would look even better with some variation in hue.
This is actually exactly how this would look if you were standing in this cave from the perspective of this picture. The cave is dark inside, and light outside. Also your ability to pick up details with your eyes decreases with distance, so the picture loses contrast the further back. It's a good example of depth.
On that note, the only critique I have is with your color choices. It would be much better if you had some hue shifts in your palette. Maybe from a dark blue/purple to a slight orange/red.
Not if you are looking out from the cave. I think this piece is superb. The only thing I miss is some variation in hue, but awesome work overall.
the depth is messed up. The light / neutral stuff is far from the player, the dark/ saturated close to the player.
That's a nice level of depth.