Android Game Modifications using Unity 5

I have a game that's already made but I just need changes done to it! Made for Android using UNITY 5 . You must be using Unity 5 to work on this and must have previous game experience. INTERACTION --Implement pair of buttons for next/prev fish in bottom right --Tapping any dolphin should zoom/follow/watch it (the old build did this) --Zooming should be free, not just on pinch to zoom-to-center --2-finger swipe for panning (without rotation) ----Increase the "swim zone" to be bigger for more space between animals ----Move dolphin info box to bottom left corner and restyle (will provide mocks+assets) ---Improve dolphin swim paths to be more random, natural and maintain realism ----Remove the shadowing effect that darkens some dolphins. More work to come. I need this done within 15 hours. WIll pay extra.