Surprisingly not bad. I am not ashamed of the game being associated with this movie, unlike with the first one.
One thing I like is that they kept the "Basil Exposition" moments to a minimum. For our little audience (2 neophyte gamers, 2 veterans, and 1 non-gamer), there were surprises and revelations in the action, but it all hung together. I like it that, as in Star Wars, they didn't explain the technology, they just did it, as with the repeated use of the "Gust of Wind" spell, and the Gem of True Seeing only being named the second time it was used.
So what level were these guys? I'd say about 8th.