An interesting concept, but I feel that another cool way to control it would be point and click, and drag to move the sphere. And maybe a way to push the "enemies" away from you would be cool ANd a mask pickup that could refill your "health". If you do add the ability to push others away, I would reccomend increasing the size of the sphere. I think it is a very good concept, and you could probably take this much farther if you wanted.