Let's be clear, this is not a bad game, I didn't encounter any bugs or major issues playing it. The reasons I don't recommend it are the following:
1) It's really short for its price. Granted I didn't go achievement hunting or read the entire lore, but finishing a 25 euros game in 3 hours is a bit quick for me.
2) Even thought this clearly tries to emulate the type of game that Journey or Abzu are, it doesn't quite reach the same level.
3) It's a really "safe" climbing game, I don't even know if it's possible to die in it. Not that it's completely unchallenging, some moments are still relatively interesting, but I would have liked a bit more. A leap of faith really isn't one when you have a magical rope keeping you from falling.
4) The ending falls flat to me. It might be purely personal but it felt lackluster when compared to what I had in mind.

So I'd say only buy this game on sale if you really need to scratch that Journey type itch, or as part of a cheap bundle somewhere (that's what I did and I'm not disappointed in the end, but would have been if I had paid the full price instead).

Simply beautiful. I loved to climb.