Here is a fairly old scan from a rough sketched drawing from my moleskin notebook. I have a few that are dotted about at home and in the studio to capture ideas for parts of environments, platforms, objects and characters that I am pulling together for interactive apps and games.
Being a simple sketch, I spruced it up a bit with some digital paint. I made some simple custom pencil and paint brushes in PhotoShop to retain the hand-made traditional art look.
Here is a demo screen capture video I made of the hand-drawn demo game level drawing from above. It’s got a rusty acoustic guitar riff I played over the top just to add a bit of atmosphere to the demo footage.