it's perfect for a platformer. Isn't it ?

Lots and lots of stuff. Meh :--)

I know this is old but It´s trully impressive, the art and the game. Was there moree of the game made besides the prototype?

I find this trully beautiful. Love especially the purples on this palette.

Very nice. I like the style / stylisation of trees. 

 Yep, spaceships really fit the setting, don't they?

OP: Very nice. And the game is very addicting.

 Amazing. 5/5

 Wow, I really love your trees :)

Very good...you should put a spaceship on the screen aswell?

The leaves (see top) aren't quite done to me.  I mean come on, the tree to the right of the spider has just a single splotch of purple haha. 

very cool, I like the colours and how you have done many of the textures.

Nice

Haha, nice game as well! I like these kinds of scrolling background, and obviously you make great ones!

Awesome.

 Fantastic.

 Some VERY impressive paralax.  Well done!  Almost mesmerizing to just watch it move!

This is on the brink of being a great piece. Though the total lack of AA disturbs me a little. Also there are a lot of banding issues on the spider's body. I like the strange contrast of the blue in the background. The rock and leaf textures are great.

 Talent 

beautifully rich!!

I'd fave it, but 58 colors? too much for me.

:P kidding! this is great :)