The graphics are terrible; they actually hurt the eyes. As for listing this as a "game" --no. Change it to "code barf" if it is going to be classified in any way.
Passage explores the journey of life from a purely naturalistic perspective; that which the character's life on earth is all he is living for. Throughout the game, you have the opportunity to collect treasure chests; but all the while, your character is aging. Slowly but surely, he will reach the end of his life, and no matter how much treasure you have collected, as the author says, "your score looks pretty meaningless hovering there above your little tombstone." What I got from playing this game is that life is pretty meaningless if this life is all there is.