Picked this up in a bundle, downloaded it on a night when our gaming group was down two people.  Very elegantly fit the bill for a 3-player, zero-prep, GMless game.  Simple rules and good use of the cards as random prompts.  I especially appreciate the characters' agency to quit prematurely (though in our game we agreed that they weren't actually *able* to leave the monument by the time they wanted to turn back) and the way that shuffling in the problem decks can send the game quickly careening from nearly won to completely out of control.  Would definitely play again.