Remmiz Chamber 1 is my first Portal map and also the first in a series of chambers. I tried to re-create the look and feel of the official Portal chambers while keeping the difficulty at a moderate level. It took about a week to create and is now in it's final version at 1.2.
It contains 4 different puzzles (with the last being a multi-part one). Also included is a Challenge version of the map which should add some more replay onto it.