Just keep pushing! :)
Nice game, it has a kind of Monty Python vibes going on, with that hand and music, loved it :)
It would be cool to have some control over actions, though - now it feels more like a movie. E.g. it can be some bar when you want to push at the right moment to strike furthest (like in a pool/golf game, for example). On the other hand, it seems like you staged every throw pretty well - looks like the path of the boulder flight was carefully drawn for each speed, so it often feels like "oh, almost there!"