Reddit reviews Twin Size Headboard with Army Camouflage Design and Dark Green Frame

I would recommend taking down the cabinet if you can... As it's just too big to be above a bed like that.

To hide the non painted part you could make yourself an easy tall unique headboard out of cammo fabric that matches your walls and carpet colors, some rope, grommets and pipes.
http://www.amazon.com/Headboard-Camouflage-Design-Green-Frame/dp/images/B001662QKO

http://shop.vtarmynavy.com/camo-fabrics-fish-net-and-canvas-material-c11.aspx

http://www.etsy.com/listing/163712507/military-digital-marpat-marine-corp?ref=related-3

https://www.google.com/shopping/product/8518791785428979397?hl=en&q=grommets&num=20&bav=on.2,or.&bvm=bv.53760139,d.aWc,pv.xjs.s.en_US.1iFepK0GFHA.O&biw=1024&bih=672&dpr=1&tch=1&ech=1&psi=wTRWUr-GNubkyQGpkICIDQ.1381381314121.5&sa=X&ei=yDRWUoTCBsLWyQGTkYCoDA&ved=0CJ4BEPMCMAY

The tall silhouette will be nice in a small room.

Then you might get wooden rolling blinds. You can get blinds with liners or liners to put on Woden blinds for more privacy if needed.

http://t.homedepot.com/Decor-Blinds-Window-Treatments-Blinds-Shades-Bamboo-Shades-Natural-Shades/h_d1/N-5yc1vZbt0v/h_d2/Navigation?langId=-1&storeId=10051&catalogId=10053&searchNav=true

On the wall across from the bed you can, if you want do a diy slat wall with inexpensive slat boards. They can hold staggered shelves that can hold whiskey bottles and mikitary memorabilia.

http://www.remodelista.com/products/mandal-wall-mounted-headboard

Or just do staggered floating shelves. You can buy them at Home Depot, ikea or lowes etc...

http://spousebuzz.com/blog/2013/01/5-creative-ways-to-display-military-memorabilia.html

Depending on the memorabilia you have, you can frame some for art for the wall opposite the window...

A lamp for your sidetable http://www.target.com/p/threshold-pharmacy-desk-lamp-bronze/-/A-14215677


If you keep the cupboards you might cover them with removable chalkboard paper to make them black
https://www.google.com/search?q=removable+chalkboard+contact+paper&ie=UTF-8&oe=UTF-8&hl=en&client=safari#hl=en&num=20&q=removable%20chalkboard%20contact%20paper&sei=2jJWUtO6DOSMyAHWzoDYAQ&tbm=shop

Or a set of cammo monograms on each cabinet door

http://www.babymilano.com/Interlocking-Monogram-Green-Camo-Wall-Decal.html?gclid=CL-Lus-7i7oCFckRMwodCx8AGQ

And center the bed under the cabinet and get rid of the book case as superflippy suggested.

Well you should get rid of the bookcase whether you keep the cabinet or take it down.