I think you can still have choice in a deterministic system - the only caveat is that your choice and what you choose was predetermined.... but that doesn't really matter. LOL
You are choosing, making a choice and effecting change however this was all part of the grand design and known in advance so technically, you did not deviate from the great wind up machine.
Now to splash in some religious color to this:
God is the begining and the end, the alpha and the omega. He ( sexist, I know ) is the prime mover. He knows everything about you, what you will choose, and what will happen as a result. He knows the future and has complete control over it because he crafted each and every detail of this system.
Nothing that happens in god's world is an accident, nothing is flawed. There are no mistakes - each and every cog in this machine is there for a reason and is tied in with something else. Lucifer, murderers, disasters, sickness, the angels, mohamed, sinners, scientists, athiests, doctors, accidents, bad luck, karma, born agains, evaporating black holes and spooky branch davidians interacting at a distance are all intertwined in this gigantic collection of gears.
Perhaps this god has made this wind up toy for his own amusement so he can sit there and watch it churn and transform before his eyes - smiling and laughing as he watches people do things good and bad, argue and fight over their beliefs, warm the planet, and most importantly, try to figure out and explain how this contraption works.
Perhaps this universe sized toy is just one of many bizarre trinkets that are sold and traded like cheap imported goods at a celestial bazaar? Perhaps others such contraptions are completely different from this universe thingy. I don't just mean different stating conditions, I mean as different as a fruit cake is from a television show.