Very polished, feels like an app you could download right now in the Play Store. Also love how well (and quickly) the game is taught.
The “randomness” (or chaotic nature) of the puzzles feels near the right balance between “oh god why don’t the leaves ever do what I want” and “yeah, I feel in control”. Sometimes frustrating, but never too much.
(As others stated, level 6 blew up in my face with leaves appearing and disappearing randomly :p)