Wow... love this! It reminds me of the 2d platformer mech games from SNES like Metal Warriors or Gun Hazard.
Not sure I agree with the others about adding black outlines/ui. The mech's got a larger value range than the BG elements. UI is very bright. Seems like good FG/BG separation to me and a good balance of atmosphere.
Wow looks great! But I agree with opacus about making the mech stand out more. I'm a big fan of black outlines but I know that's an aquired taste for some. Fav though!
Very nice! I really like the mech design. If this is truly a mock-up and you want this to be game-worthy, I'd try to differentiate more between the background and important objects such as the mech. Right now, the mech is pretty desaturated even though it's the main player (or so I assume). Might be less pretty, but making it pop would make it work better in a game. Also, because the ui elements are so saturated, I think they distract from the game world and becomes the first thing your eyes are led to. I think they should be clear, but unobstrusive and not too distracting. Again though, really great style! Would totally pick this up if you were ever to turn it into an actual game.
nice!