Lack of feedback is a real problem in any community like this, the most active members tend to be writers rather than readers and more focused on their own projects.
I pretty much only review/comment on games that are either good or, in the least, show promise. Those that show promise I only comment on until they're finished, then I review. It's sad though, that most games that I comment on and I think show promise, I never see a finished product! Bleck.
Bad submissions are the only way to learn. You could throw early Asimov into the sandpit! Artists need to start somewhere - all you can do is keep the criticism honest and helpful. Try not to get jaded, if you get too numb you'll stop recognizing the potential in the 2% who are all we have left.
I have great news! There are a large number of excellent games on this site and they have generally bubbled to the top through the grading system. I speak as someone who has just recently returned to playing games, with a little experience of creating them. Having found one good Quest game, I chase up others by the same author and also find new games by following the recommendations of reviewers who have been enthusiastic about a game I like. There are, of course, some very strange reviews and some unplayable games but for the moment they are just a minor nuisance and not blocking my path to the good stuff. The site feels very healthy to me.
You should also look for games that are frequently played :) Sometimes people forget to leave a review and just come back to play a game over and over again ^_^
I have not had a chance to test and place many games recently, but the good news is that with the new publicizing options for users, it doesn't appear that I need to. This is awesome!! Out of sight, out of mind!
I'm still trying to catch up with the backlog of good games by enjoying each one like a fine meal, which stops me pigging out! For the moment I probably have enough to keep me going up to the end of the year, especially as I mostly play the puzzle-oriented games that can takes days to finish. It's amazing that such a rich facility exists.
I have played two of your Xanadu games and loved them both. The first time I tried playing the first one I gave up after a few hours because I could not get past the town. Later after visiting the forums I was able to complete the game and then make it through the second installment. Really looking forward to the third one! I don't spend much time with most of the games I come across for the very reasons you describe. Right now as I am waiting for your third Xanadu game I am fighting with another game. It is reportedly the first and probably the only one put out by this writer. Goes by the name "Longshot". The name of the Game is WHOO GOES THERE? I have enticed one other player to try it out. We are both stuck. Some of his puzzles give yours some serious competition. It is well written although there are a few glitches here and there. I'm hoping more people will get into the game and share some feedback. Like the first Xanadu game I played presently I am bewildered and need some help. If you want a challenge here is a good shot.
I'm going to have to give it a shot, but will not get to it until the weekend! If you run across any others, please let me know. I'm interested in playing games similar to what I write. Thanks.