This is nice - I like games that link a mechanic to their conversation options. I found it difficult to get to grips with at first, though: I tend to assume that a "click, drag, release" movement system is going to fling the object in the opposite direction to the one dragged (Angry Birds-style), so ended up shooting straight into a barrier at the earliest opportunity. Even after that it wasn't particularly clear how to progress since the dialogue option in the level wasn't visible on screen at the start.
I'd love to see multiple conversation options in this - possibly with more desirable choices tucked away behind more difficult obstacles. That would also make more of your monetisation system (to skip already-seen content), which I think is a great idea. It's always good to be able to play through a game for free beginning to end, but a gentle nudge to chip in seems perfectly reasonable once someone's trying to explore it 100%. As it is, the main reason I'd replay would be to see the (linear) story again, so I've got no reason to skip.