You are blocked by an invisible wall.
I put together a quick little video that demos some of the visual improvements DreamZZT has over the original ZZT. This video shows off the animated water effect, as well as the improved torch effect. You can grab the Quicktime video here (780KB).
DreamZZT is finally back to the point where The Town of ZZT should be completeable, though the lack of bears, ruffians, and centepedes makes it a little less challenging. I hope to at least get bears and ruffians working soon, but I think I’ll hold off on centepedes for a while longer (they’re probably going to be the hardest to write, because of the way they move).
I’m hoping to have a playable demo out in a few weeks.