Much in this game is very good, but it has some really serious flaws that prevent me from rating it higher than three stars. Most obviously, the game is just too damn hard. I'm sure some people have solved it without any assistance, but those people must be veritable IF wizards. I got perhaps a third of the way through the game (Spoiler - click to show)(I managed to find the key, and take a nap in the Cave after I grew tired), but pretty much had to use a walk-thru for everything after that...and even with a walk-thru, I STILL found it somewhat difficult to solve! At no time is it even remotely apparent what the goal of the game is supposed to be, and thus to suggest that the later puzzles are under-clued is to be generous. You basically just have to do stuff that makes no sense, until it adds up to something that kinda does. But even then, the ending is very confusing. (Spoiler - click to show)Apparently, the goal was to save the bridge. And yet after accomplishing that goal, one gets the impression one's friends have located you, and are crossing the bridge...only to suddenly find one's self back in the Cave..WTF? And your friends are still there the next morning? I guess its a campsite?
The game is well-written in many respects, and the game contains a great (non-verbal) NPC, but the game just doesn't make enough sense to really live up to its potential. Its very difficult anyway, and that great difficulty is enhanced by a peculiarly vague and not very consequential goal (and a needlessly ambiguous ending). I really wanted to like this game, and part of me did, but overall, its tragically flawed. Yet its too close to the mark to warrant a rating below three.