Xhunterko & JakerPot > thanks guys for the support, really appreciated

Depressed was a strong word, I'm just concerned by all the issues, even if I like some parts I don't have the control, mostly trial and errors, exciting but also a bit hazardous. I can't wait to feel more at ease with the technical side and concentrate on the design/game design.
By adding more colors to the palette I meant to expand the values and work more on the depth. The comments helped me a lot, whether I agree or not, it's always good to think about someone take on a piece. Arachne really kicked my butt in a gentle way. Understanding why you're down or not with the opinions expressed.
The metal thing for example, the fact it should "shine more" depends in which context you place them, dusty places tends to damper the effect and the atmospheric perspective too.
Eobet > yeah I agree that's why I wanted to upscale, the game will be made in Flixel (AS3) zoomed x2 and free, I didn't even thought of making it playable at original pixel size. But the more I work on it the more I realize I'm not elegant enough with pixel to blow up the resolution and show the pixels, constraints are a good things until they cut the motivation. I started this for fun and wanted to discuss it on forums since the beginning, so I'm forced to finish it in a way, and I really like the way people here say things plainly.
No pics -shame- but more tonight !