I have been working for a while today and this is where I have gotten with my progress. This may look more impressive than it really is. It is in no way interactive yet, but I've got a slime cube moving around using a Unity Navigation Mesh. I made the torches with some particle systems and unity cylinders, and the cave floor is a Unity terrain with some stalagmite structures painted in. That little glowing wafer on the floor is a test of a gold coin. To make the slime I used Blender and subdivided a cube object and stretched the bottom part a bit.
I am going to start working on allowing the player to feed coins to the slime.