I liked the middle. The middle was classic Indiana Jones, uncovering mysteries in mysterious languages and running through graves. There were a few scenes too hokey, even for Indiana Jones, but I'd give the middle 3.5 stars out of 5. There were some computer animated animals that were very computer animated and not very lifelike.
The parts that I don't like can be summed up in one word: Aliens. They reveal it pretty early on, so I don't feel bad giving it away. I like alien movies. I like Indiana Jones. I also like both chocolate and pickles, but I don't put the two together. Give me mysterious mystical powers from ancient times with my Indiana Jones. Keep the aliens for X-files.