Played on the touch this is an exercise in frustration and belies a lazy attempt by the software author.
Objects are unrecognizable blurs (at best), any attempt at a storyline is thin and unrelated to the task. Scenes all look similar to the same.
Absolutely not worth $2 for a single player on the Touch. Frankly, I do feel ripped off.
OttToyBoy about Lost in the Amazon, v1.0