I absolutely LOVED the atmosphere in this game. No peril, no stress, just a lovely experience of wandering around a beautiful environment with gorgeous chilled music, collecting shiny things. Exactly my favourite kind of game.
A few quick comments (spoilers):
After getting the specimen out of the burrow, I couldn't pick it up until night had fallen - is this a bug?
If you fill the nocturnal enclosures before the diurnal ones, and examine the full nocturnal enclosures, it says 'All of the enclosures are full! Once the nocturnal enclosures are full, our mission will be complete!' when the nocturnal enclosures are already full. Should it say 'diurnal' there?
(After I subsequently filled the diurnal ones, it still said the same thing, even though the nocturnal ones were full.)
The only thing I was flummoxed by was the launch code. I hadn't noticed that there were numbers that corresponded to the map areas, and by the time I had to enter the code I had already secured the robot and couldn't go back outside to check the areas! Is it possible to un-secure the robot or to see the map from the launch manual at all?
Overall, a really great, polished game. A pleasure to play.