Stuck on world 5. Tried walking through every effing space on the map and bumping every bit of bedrock. There's nothing to explore, no hints, nothing. Tried resetting, tried opening the craft table window and walking over to the bedrock to press the craft button... nothing.
Patch notes indicate at least a world 6 exists, but there's really nothing left to try and no hints to go from, so I have to assume this is deliberately unplayable.
Edit: I conclude it's "deliberately unplayable" instead of assuming it's a bug because another of the dev's games requires interacting with the dev console of your browser... which is a terrible practice for so many reasons. But it did have instructions on how to do so for a number of different browsers and the only thing I hadn't tried to get this one to work is trying another browser.