I've played all three as well and have to say I was astounded by Journey! The visual presentation is phenomenal; especially the subtle and dynamic lighting.
The gameplay is simple yet ingenious! Using simple chirps to communicate is both charming and endearing; allowing for both players to come up with creative forms of expression! It's also a joy to hover upwards (you can get very high up and it's almost like flying) off of each others jumps! This is another one of the elements of teamwork the game presents.
The game also makes use of the Hero's Journey formula. For more detail on what I mean you can go here for a quick summary:
-In short: you as a player are given a purpose. (You need to get to the top of that mountain!) You as the player have to decide to listen to the call, leaving the safe, ordinary world behind. Do you chose to venture forward, into the unknown?
-You are given a weakness to overcome. This is your short scarf. You as the player aren't perfect and over the course of your journey will go through hardships gaining newfound strength, overcoming your weaknesses and growing (a metaphor for the gradual growth of your scarf) as a person.
-You meet an archetype of yourself or a comrade/mentor that helps you out during the quest. It is through this other person, you find strength, friendship, wisdom; and dare I say "love". You both teach each other about the world and it's surroundings as you venture through it together!
(I had fun showing my partner where all of the scarf upgrades were and how to get them!)
-There is an "all is lost moment" or what is called "the dark night of the soul" event. It's a point during the journey when your quest seems impossible! There is no way forward! Your will is completely shattered! All is lost! (Without spoiling too much, this moment could be the climb up the mountain...)
-The death of the hero, and the eventual resurrection occurs! There is a point where it seems like you as the player are very much "dead". You feel utter despair for this loss, but are eventually uplifted and elated by your resurrection or "rebirth". This can also be a metaphor for shedding and leaving behind the old, inexperienced part of yourself behind; transforming and becoming the sum of all your experiences; a new person with newfound hope! (It would be taboo to spoil this part of the game for someone who hasn't played it!)
-The elixir of immortality. This is something which you were questing for or trying to accomplish the entire game; something that can change the world forever! An example of this would be the Golden Fleece from Jason and the Argonauts. So, did you make it to the top of that mountain? How has the world changed from this journey? This part of the game was a little more subtle and open to personal and metaphorical/spiritual interpretation. (maybe you wrote down the username of the person you were with and began an actual online friendship or met in real life? The games elixir of immortality projected back onto the real world; changing your life in some way....)
Basically, It is by this blueprint we can all truly relate to as human beings. It's literally the story of our lives! What makes this game even more amazing is: unlike other forms of media like movies and books, it follows the formula with no written or spoken word whatsoever!
I'd say it's like vibrant flowing color and music given meaning and form!