Answer 1

Very pretty, but it's very hard to distinguish foreground from background. :(

Answer 2

I echo that sentiment.  Try to plan out what's going to be collision and what isn't, then make everything in the "isn't" group a significant contrast.  For daytime maps, generally that means the background is lighter.  For night time maps: darker.  That's just general help that makes maps more playable, but you can probably figure it out simply by playing more maps on Atlas and seeing what other people do.

Answer 3

I think this map is good. Like Morelia said it is a little hard to tell some things in the foreground and some from the background. I felt like the routing was a bit awkward and it wasn't always clear where to go. It also felt a bit weird to have killboxes in places the players would obviously try to reach but no killbox when you fall of the map infinitely.The artwork is really nice though, and I liked the layout of the map after the first section.