Really, really nice game. Music is super atmospheric, gameplay and controls are really fluent. The only thing that annoys me a lot currently is that there is no save point (yet) in the blue area, whenever I die I have to do the whole thing again after the green save, feels way too long for that.
Edit: Got a bit further, and it, really, really, really is frustratingly long before there is a save point. So much to the point I'm almost giving up, because it really sucks. Sorry for the rant ;-)
Edit: An on top of this all, save doesn't work in between game sessions .... ugh ...