We had a rough start, wasting about an hour setting up. We made fresh characters, since the past sessions had been pretty stale. When we finally started, they one got eaten by a purple worm, and the the other got 19 damage. (the third got away) It definitely was not a great encounter, and i should have changed it or done something, but i didn't. Now they're kind of ticked off at me, and i have no idea what to do. Any advice?
The adventure was Mines of Madness, and when you enter a outhouse outside the mines with a sign that says KEEP OUT, a purple worm from later in the dungeon pops out and eats you. defintely not the greatest 1st encounter.
Edit: Thank you for all the advice, will start milestoning, and will make absoulute certain that the players know what they're getting into