The green-on-black has an interesting "Old CRT Monitor" vibe to it. It would be better if it was a little darker, but not too dark. I do like the woodgrain background though.
I'm developing Intellivision games in my Portable Environment using emacs with the "Wheatgrass" theme, one of the built-in packages, which provides a black background and whose default foreground color is peach on my phone and tan on every other device. The syntax highlighting scheme that I developed uses various shades of mostly green and brown, with some blue and grey, and red for warnings. Just enough contrast so I can see at a glance what's what, without putting a strain on my eyes.