This is a strange game; it might not even be a game at all. I got it on sale for $2.50 from Steam.
It reminds me of the game Journey: A beautifully-rendered environment, with the sole purpose of reaching the end. There’s no interactivity, just a narration that changes depending on where you choose to go. Without giving anything away, I’ll say that your interpretation of the ending depends on the narration you’ve experienced; that’s the only way in which your choices affect the outcome and the game’s only replay value.
At $2.50 for two hours of play, the game represents a reasonable value. You’d have to be a story-telling fan (like me) to appreciate it; if your tastes run to “pew-pew” action then Dear Esther was not written to you.