Interesting and fun
I like the concept a lot and reminds me of a childhood game where people can only move when you aren't looking. However I've found that you can practically continue forever without using the white "chances" to push away people. All you have to do is shake your mouse slightly left and right until the people move out of the way. I only stopped cause I got bit bored after I hit the 150k points you mentioned in the description.
Perhaps it is later on in the game when the situation becomes too difficult that the white balls come in handy. Can't say I would replay this game after a few tries though.