Answer 1

Not bad but I recommend using cameras if you are going to have those large jumps, first time I went through I was convinced I had to go down on most.

Answer 2

The map is hampered greatly by a lack of a camera and very monotonous endless tiles.  Since it has no landmarks in the sea of brown, you have nothing to really judge your distance with on the blind falls.  The only way to nail them all on subsequent plays (because you're definitely dying the first time since you can't see where you're going or where to go) is memorization timing.