I can understand the frustration of working without too much reaction from the public, I've worked on countless projects in similar circumstances. For one thing, like Strange Darkness said, there are people here who're waiting for this. And furthermore, there are many more people who will check out the level. Look at the releases board, even for levels that received one or two comments there are dozens of views. Not a lot of people commented on most of my levels, but from my website stats I know dozens have downloaded them and played them. It's just the way people are, most are too lazy to give any sort of feedback, even if they like the level very much.
My point is, even with little reaction from the public you can still work on your projects and finish them. Doing something you enjoy and feeling the sense of accomplishment once its done is terrific by itself, no? As for players, like I outlined in the above paragraph, don't doubt for a second that a lot of people are going to check the level out. And I'm sure your level will get reactions once its finished, since people tend to like larger levels with interesting storylines
upd: Also, look at the current KS competition! Right now there are some really ridiculous, difficult rules to comply with, and yet there already are four entries... some of which are quite original in concept. I don't think a dying community would've produced something like that, hmm?