I don't quite understand?

There's plenty of hints scattered through the game, and the 'story so far' widget explicitly tells you what to do next. Many players have actually considered ZA to be very easy compared to other adventure titles.
Sorry you didn't like the limited inventory thing too - it was a design choice from the very beginning. Starting from 1.0.4 we actually patched it a little bit, with some items being removed or shuffled around, so it wouldn't be that much of a hassle anymore.
And speaking of updates, totally forgot to post it here - 1.1.0 features a nice little surprise for everyone, as we added a colourful, 41-pages long manual, featuring some unique artworks!

And finally I gotta say - the last two post-release months were pretty crazy for the both of us (sorry I wasn't very active here!), but man, we absolutely didn't expect to receive so much love and support. Thanks so much for everyone who gave our game a chance!

(full view available here)