I love the look of the robots, how they are basically shiny pink toys, but *huge* . . . and evil. Especially their legs and arms; they remind me of robots from 50s and 60s scifi, with all the ventilation-tubing-for-arms and so on. I also really like the the upper background, with the darkened, cloudy sky and the railways and towers overhead. Everything looks very menacing, in a silly sort of way, which is definitely appropriate.

The main thing I would suggest is to try and liven up the texture and color of some of the stuff. Other than maybe the robots and Yoshimi's suit, everything looks a lot smoother than it maybe should . . . I guess "grittiness" would be good? Also, the lower portion of the background could use the same level of detail as the upper portion. It won't distract from Yoshimi or the robots because they're pretty central and take up most of the panel, so don't be afraid to draw in the street and such.

It looks like an old thriller movie poster. Hehe . . .

Yeah That really reminds me of those old sci-fi movies.
The robots look cute in a deadly way. =P