hl puzzle level. 1 thing u might notice from the screenie is that its not actually 1st person. id recommend using the arrows to turn instead of the mouse. some of the puzzles r quite hard, but dont give up!
PS: u mightve also noticed i didnt put any lights in. i tried lighing it and it just didnt look right. if it looks bad its probably because ur runnin the graphics in software (i recommend opengl)