This is really cool and I LOVED the intro. Having to find yourself in a sea of people. I would suggest decreasing the gaurd's vision and also putting a visible radius of site so the player knows when they will and won't be seen. it took me 5 min to get past the second section and as soon as I passed the threshold to join the line of lemmings the next guard spotted me. This can definitely be flushed out to a full game! Great concept and great start.