This is how my world map ended up:

I went for 5x4 = 20 rooms, trying for a balance between "big enough to be interesting" and "small enough for compo".

The six rooms at the bottom center with the lighter colours are a sort of "tutorial area". There's no explicit tutorial, but you can't leave this small area until you find 3 triangles, and the mechanics in there are limited to just a couple of simpler things.

The map wraps around because it's easy to implement and reduces the time players need to spend schlepping across the world. It's like having fast travel, except you barely have to write any code.

I wanted to get about half the map filled in on the first day, and finish it on the second, but was behind schedule for most of the time.

30 hours in (map still barely started):

35 hours in:

Would have been cool if I'd done regular PNG exports from Tiled so I could do a timelapse of the map filling in. Oh well, it's an idea for next LD if I do this kind of map again.