I have to say, this is very addictive, loved it! Really like how clean everything looks too. Loved how stage 1-3 had a patch of regular ground that could be used to finish the level with less moves if the player payed attention enough, good design!
But maybe you should make more clear that you can Aim & Shoot clicking anywhere on the UI, and not only on the ball. I know it's written on 'controls', but at least a quick tutorial text on the first level would clear that up for the player.
My course score was my favorite number by the way, 12 :D