Alright so I couldn't figure out a way to make any other way to swim so instead to fix the issue I modified the map a little bit so anything in the water is close enough to be touched on land. And later in the Deep Forest there are green sparkles that will be able to teleport you to the islands since you cannot swim! (Sorry but the plug in I am using doesn't have mobile support!) Make sure to get the Mobile version for all of this.