not bad, although a little annoying
I might be just unobservant, but is there a possibility that one of the keys was in the chest and one of the keys I used on some chest wasted my last key for other boxes key? Cause I now have 99 mushrooms, 1 locked chest and 23 journal pages. I solved all shrines, so now I have flying, ability to see sparkling things and teleportation runes. Nothing sparkles in the world anymore for that one damned locked chest and I walked and flew all over the world for maybe 5 times throughout and back. Did I miss something?
On the other hand, the game is someone enjoyable, really n ice graphics and collecting things relaxes you from all those repetitive shoot em up zombie games. It gets sometimes a little laggy, even if I'm not opening my map (and it's very annoying to have opened map lag the game), although in the beginning it went very smoothly.
So the game deserves it's credit, for being fun for most part, even though it gets a little annoying when you can't find the last parts of the puzzle.