Well, the game is tile based, and player move in a "Rogue like" fashion. That means everyone move one step at the same time.
However, unlike rogue where the game waits for the player to move, in Wonder every turn takes 0.8 seconds. If you didn't select a move by that time, you won't move while all the others will.
I am also thinking of doing a "rogue mode", so there will be a single player mode where it plays similar to rogue.
Hope that answers your question.
By the way, I have already posted some other screenshots, information and video over here. But they were all over the place.
If you want to see more stuff(maybe to make this issue clear), you can take a look at:
http://www.indiedb.com/games/wonder