Of the two images in your latest post, I like the one on the top better because it suggests a 3d effect, with the platforms extending out from the wall.
If you stick with the regular square background, the positions of the platforms relative to the squares could be more consistent. If I was playing this game, one of the first things I would do is measure the jump/run distances against the background squares so I could easily discern if I could make a tricky jump.
Tourist