Could I add some constructive criticism? I know that perhaps it's not something that you can easily change, but still.
1)The backgrounds...I like the color, but the glow effect, not so much, esp. with bright colors like orange or green just strain my eyes.
2) I know there's a terminology for that stuff, but the stuff that's in the background, when those are cogs and other "passive" items it's okay, but could you make sure that when there is a platform section, there won't be any platforms of the same type in the background? It's confusing.