Oh right, I never updated the description.
So two things. One, there's a new level that you can play, accessed through editor levels. For the near future, this is how I'll share new levels. For now all these levels are temporary so I'm using temporary means to add them to the game, and it has the added bonus that this way you can also edit them.
The other new feature is that the level editor is (or at least should be) fully functional on the web browser. Before you couldn't share levels using the browser version, but now you can.