Generally a delight. Environment design is a triumph, hitting a poetic balance between realism and wonder. Fantasy fiction with a realistic underpinning sums up the plants, the gameplay and the milieu - fits together wonderfully. My gripe is that some of the later puzzles can be irritating in an old-school adventure way, where you know exactly what the puzzle solution is but can't hit the order or particular manner of solution the designer intended - a hint system of sorts would have smoothed that significantly and wouldn't turn a lovely experience into one with moments of frustration.