First bit of work done
I'm going to try for a "top" world, and a "bottom/underworld" type of theme.
I'm borrowing heavily from http://arcade.academy/examples/index.html
Currently I can move from the top layer to the bottom layer and back.
Layer 1: Maybe some castle or a school or something
Layer 2: Catacombs or a ventilation system or something.
Layer 3- Underground caves