1. Wing Shoe or Fast Feet can be found in Pickups -> Goodies
2. In the Layer Properties there are two boxes that say "Width" & "Height." 20 is the width and 15 is the height. Enter any number in these boxes (in this case it would be between 20 - 40 width and 15 - 30 height for the contest).
3. One, I guess.

BTW, expect a level from me soon.