The game has a great ambience and the musics/voice audios are simply awesome! This is also a pretty polished game! It reminds me a lot of Portal. Unfortunately, i couldn't figure out what do to in the 3rd level. :(
There was only a few small problems, but they are not a big deal. For non native speakers, the narrator lines are a little bit hard to understand sometimes, but some subtitles should fix this. And also, the glass walls (at least in my monitor) are hard to see. But, like i said, they are not a big deal.
Congrats! :D