Nicely done. The concept of audience capture was interesting and maybe with a longer story could have been very fun to play with. The UI looks very nice and felt good overall.
I do agree that the randomness of stealing the attention makes it hard to strategize around but not everything needs to be plan-able. Now one thing I would have liked is to allow your team mate to make a move. I found myself hitting the boss with the same character over and over again until my hp got very low due to not being able to heal. The mountain skill also didn't feel like it did anything.
Overall though, good job.