itch.io

Which parts were frustrating for your players? Seems to me that many of the situations had multiple solutions. It is the players job to come up with ideas and it's the DM's job to adjudicate in a reasonable and fun way. 

Now maybe your players are used to everything being easy and/or they don't like traps? This old-school dungeons rewards cautious, thoughtful players. And if the DM appropriately tips/hints, then the traps/challenges need not be a big issue. 

In my opinion, this is a great starter dungeon for a new DM and group. Easy to run.  And if the players don't know what they are doing... well they'll learn the hard way!