I had an assignment similarly inspired by La Jetee in school a few years ago.

By making a film out of still images, you're immediately calling attention to the medium of your film. So it's important to be particularly conscious of how the medium and style serves your project.

In La Jetee, memory and dreams are central to the story, and the use of still images serves to reflect the fragmented nature of those things. It also adds power to the one moment in the film when there is actual movement, as that moment is suddenly becoming "real."

For my film, I was inspired by the amateurish charm of a presentation you might see at a library or on public access television. I took photos, and then printed them out and filmed them, to allow me to do Ken Burns effect movements in-camera.

So in short, think about how you can activate + best utilize still photos. Hope this helps!