Some pretty nice work, but I have to give one piece of criticism:
A but unoriginal to use such obviously german uniform details for Darth Vader. It's getting a bit old that pretty much everyone sees old, historical germany as the arhcetypical "evil empire".
Also, Luke looks pretty inappropriate. If the story had taken place in a pseudo-Victorian steampunk setting, then Luke would've hailed from a desert land, and by that reasoning he should've been wearing clothes inspired from middle eastern articles of clothing if you ask me.