if you'd tone down the blacks and up the whites and minimize the gray areas, it'd create more contrast for your image. more contrast here = more drama..

try one of these solutions:
gradient mapping: Black-to-White
channel mixing: tick the 'Monochrome' checkbox
*** tweak them to your preferences.

these methods of desaturating are better than the Image>Adjustments>Desaturate method. this is because #1: desaturate only removes color info. Editing contrast and brightness afterwards makes the image look unnatural. #2: grayscaling using the 2 methods mentioned above would not ignore color information and preserve the harmony of the blacks and the whites and the greys. #3: the image would become more detailed.

try them out on photographs to see what i mean

and.. dont delete your previous artworks so you can gauge your progress everytime you submit a work.

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_{i'm merely remarking upon the paradox of asking a masked man who he is.}

OK. Thanks! That is for photoshop, is it? The thing is, I have been using GIMP 2.2 on my laptop. I'm challenging myself by trying that out. Anyway, you are right, it still does need improvement. I will work on it. If not this work (Just in case I couldn't make it work) I will try these things out on my next few ones. I find the two-tone project really interesting.

Thanks for taking some time out to help out!

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:signum-io

indeed. photoshop it is.

although it'd be really interesting if you do cross-platforming

i mean.. gimp and photoshop too bad they both run in different OS'es

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_{i'm merely remarking upon the paradox of asking a masked man who he is.}

Yeah. I'm using GIMP on Windows, though. It is quite a challenge.

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:signum-io