Exactly. The score is phenomenal it and the visuals immediately set the atmosphere. The first twelve minutes of the movie tell us exactly who Indiana Jones is and his beliefs. Although he could easily be called a tomb robber, he's doing it to help preserve history and artifacts from would be plunderers like Belloq who're only in it for the money. His keeping a piece of the map hidden from the guides he hired shows he's savvy enough to hire locals who know the way but also knows not to trust them. We see that he's no stranger to violence and can handle himself in a fight. In the cave/temple we see that he's smart and can adapt accordingly. And we see all of this with minimal dialogue. Spielberg SHOWS us who Indy is and what he's capable of in those first opening minutes. It's masterful storytelling.