I played through all 5 adventures as the start to a BD&D campaign back in 6th grade. At the time, the adventures seemed OK. The only memorable things were:
* I think the first adventure had a +1 hand axe. My thief won it dicing off against everyone else, so for many levels I used a hand axe as my primary weapon.
* The really lame doppelganger in the second adventure. IIRC, it walks around the corner and brings with it box text that goes something like, "A guy who looks exactly like (fill in PC's name here) comes around the corner!"
We hacked the thing to death before it got a single word in. Maybe the DM messed it up, but I think that's how the encounter was written.
* The goofy puzzle quoted above.
* In the prison escape adventure, the DM gave us a couple NPC halflings to help us along. One of them died when we made him open a trapped treasure chest. The other one died when we used him to "scout" one time too many. Our definition of scouting was opening a door, throwing the halfling in the room, spiking the door shut, and listening for screams.
* The final adventure was OK. The big reveal was that the evil cleric was a woman. Her sanctuary/temple was apparently built precisely for adventures to wander in, fight their way through a bunch of monsters, then have a big battle in the inner sanctum. IIRC, it consisted of a long corridor that spiralled into the center area where the boss fight awaited.
I think it says alot that, aside from those details, I can't remember much about the adventures.