Okay, where to start:
I played this twice, on two separate occasions. The first time, admittedly, I was pretty lost and unsure of what I was supposed to be doing. I took a break and came back and made quite a bit more progress the second time around.
First and foremost, I loved the music. It not only set the audio apart from a lot of the other entries, but it set the mood of the game perfectly.
I like how you had little objectives around the map that were usually pretty worth walking to for their benefits, it added a nice touch and an extra dimension to the game play.
I would say that you and I both had similar challenges in the way of communicating our game's instructions to the players though in-game insturctions. For a simple game, this isn't usually an issue but your project was pretty ambitious. You guys got a lot of depth (and atmosphere!) into your game, and knowing how to take advantage of all of it from the get-go would have helped.
This is a game that would / will pop into my mind 6 months from now and make me do a google search for it to see where it's at in production. I feel like I played a really good prototype of a game that's going to be really special when it's finished, and I'm looking forward to that!