Gorgeous scenery and atmosphere, I enjoyed it, but it was very straight forward and fairly predictable. The first room was the hardest, but after that there wasn't much puzzle. At each password instance, the note with the clearly written out answer was just around the corner. Overall, though, I can't say I didn't like it! Just needs some dynamics to the gameplay.
I could listen to the music forever, and his little achievement noise is adorable. 4/5 though because compared to other launch upgrade games, this one moves a little slow.