It is a 2D first-person perspective game, and the photos provide the forest through which you trek. The sounds of the bush are present, in birds calls, animal noises, flowing rivers, and even the occasional crackling campfire. However all of this is essentially the backdrop to a collection of 24 puzzles that you will come across as you go. Puzzling along Some of the puzzles do involve the bush setting. Other puzzles have an Australian flavour - Waltzing Matilda is featured, and a game of concentration uses Australian birds and animals.
Many puzzles though have nothing whatsoever to do with the bush.
It just happens to be where you find them. Nearly all the puzzles are self contained, and you can do them as you find them. You can leave one and come back, but you can't save a game in mid-puzzle, so there is no sneaking up on a solution. Be warned though, some puzzles will be different if you come back to them - different shaped pieces, different starting positions and so on. A few puzzles have to be completed before others, so there will be little bit of backtracking amongst the scavenging.