First, let me say that this is a great, complex and entertaining game. The graphics are gorgeous, the gameplay is nice, its also quite challenging and theres a ton of secrets to discover.
However, version 1.0 is simply unplayable. As other reviewers mentioned, theres quite a lot of MAJOR bugs that makes it impossible to play the game and will ruin your save: respawning in impossible to get off from places, respawning as an enemy and being unable to move or jump (I respawned several times as a porcupine), respawning and theres nothing but the sky (no graphic or anything, just the sky background)... Its excessively annoying to have to start everything all over again all the time because the game is full of bugs...
Honestly, I feel like this game has not been beta tested at all. ANY beta would have detected those bugs instantly, seeing has I got them all within an hour of regular gameplay on one of Apples lastest device (iPhone 6 plus)
If you want to buy this game, my advice is to wait for another version. This buggy version will only bring you frustation.