How is suspense created in Momento?

Momento was directed by Christopher Nolan and was released on 20th October, 2000. It is about a man, suffering from short-term memory loss, who uses notes and tattoos to hunt for the man he thinks killed his wife. The way in which the film is captured is very smart as it is not in chronological order, ut instead, goes backwards. Two scenes which i think are important in the maintaining of suspense are; the 1's scene when he shoots the man and the scene where his wife and him are attacked. The suspense is created through quick snap shots and the symolic things for example the tattoos. Each tattoo held a meaning behind it, by not giving too much away with the tattoos, the audience becomes intrigued and wants to know more. This creates suspense as from things such as the font of the tattoos to the quick snap shots, immediately has the audience at edge.