Note: I'm french and my english is not quite good. I will do my best to describe my feeling.
The game aesthetic is awesome. Not because this is beautiful - only if you love pixels. But the astmosphere of the game, its environment, its musics, its harmony... everything immerse us into the game. That's a great experience and that motivate me to explore the map.
The gameplay is classic - puzzles - but they are quite good and we don't need more, in order to enjoy the exploration of this universe.
There are very few mistakes (for example: Frustration if you miss one "blue triangle" on your road, for the "last map"; No Alf-F4, and if you kill the game instance, it re-opens automaticly; The end is a little bit awkward, like I miss something). But overall, the experience is very good.