This is great, love the ideas here. Both the uncertain ball and the eyebrow control. If you were to continue work and make it into a bigger game I could see dropping the eyebrow thing and focusing on different ways to interpret the uncertainty idea. That's just my opinion though, no reason you have to drop it. Especially since you put in alternate controls.
If you plan to do any more on this I could see a lot to expand on. Bigger/different game areas, some flippers in the top area. Lots of interesting concepts that real life pinball machines have done.