It was just awesome. That's a mix of the best from HL2 (and mostly its EP2) with bigger maps and more space to discover than usual.
I just couldn't find that ladder at the end of that first map, i thought this zigzag was just a secondary path with a reward (ammo crates or something) for people trying to discover everything. Try making the big fence door obviously blocked, I was convinced I had to continue by car. Also, I thought i'd be able to open that big door to get in the village with my car, i looked for a way to do it for a while !
Great work, was really enjoyable !