Four colors is plenty ;) Just for future inspiration, check out glasses' entry for the challenge, he gets a lot of mileage out of two colors.

There's a lot of potential here, but the mountain in front looks like a mound of soft serve ice cream to me

i'm not that kind of person, i apreciate the criticism if it is good, if it comes with bad intention or just simply doesn't aport anything to my picture i just ignore it

CnC = comments and criticism

:)

sorry i don't know what is CnC, but only with 4 colours i cannot do that, besides i cannot put other kind of light at dawn o dusk, i'll try to make it better but i'm not that talented :P

Try using this as reference on how to shape mountains because yours unfortunately don't look like it. I do realise you have less shades to work with but if you try using a better lightsource and better shapes you should be able to pull off a better looking mountain chain. The dithering seems kinda random atm and the mountains themselves are really flat.
Creating an actual sky with clouds could give this piece a better feeling aswell. Would love to see a less rushed version/update since I like the idea.

p.s. I hope you don't mind the CnC. Never sure who welcomes it or doesn't want to hear it.