It's a 2d version of our game! So obviously I like it ;).
I would say - it's frustrating that sometimes you are at an edge that you can't see past, so sometimes all you can do is throw yourself forward and hope that you don't die. Then you do. So it's impossible to complete without dying. Which is a bit frustrating.
(In our game we tried to make it possible to complete without dying because even in the dark you have all the information you need... although our game ended up being a bit too difficult anyway)