Nice job
Nice one, I like it a lot. I'm a fan of things like hazmats and gas masks so I enjoy seeing how people use these things in their art, but I don't just like this because I'm biased. ;) The colors are great, from the author's comments I take it you usually work in black and white; already you obviously have a decent understanding of contrast (between the green needle and the red/pink background) and some ways of bringing distant colors like these together (the yellow face shield and accents). The choice in colors is also great, very dynamic and striking.
The ONLY thing I might suggest -- and it's purely a suggestion, not advice or direction per se -- is that you might try to find a way to draw out more of the contrast and depth with a bit variation in the lighting. I love the juxtaposition of the use of light "happier" colors with a rather angsty image, keep doing that (with some variation, of course), but just try darkening up the shadows in immediate backgrounds, folds, crevasses and recesses for a more sinister/menacing/dynamic air. (Think comic noir.)
Other than that tiny suggestion, I love it and you're doing everything right. :) Keep up the good work.