yay :D

output.ex

[[#PID<0.95.0>, #PID<0.96.0>, #PID<0.97.0>, #PID<0.98.0>, #PID<0.99.0>],
 [#PID<0.100.0>, #PID<0.101.0>, #PID<0.102.0>, #PID<0.103.0>, #PID<0.104.0>],
 [#PID<0.105.0>, #PID<0.106.0>, #PID<0.107.0>, #PID<0.108.0>, #PID<0.109.0>],
 [#PID<0.110.0>, #PID<0.111.0>, #PID<0.112.0>, #PID<0.113.0>, #PID<0.114.0>],
 [#PID<0.115.0>, #PID<0.116.0>, #PID<0.117.0>, #PID<0.118.0>, #PID<0.119.0>]]
iex(2)> r = Lumpus.World.get_room(w, 1, 1)
#PID<0.101.0>
iex(3)> Lumpus.World.Room.get_tunnels(r)
[#PID<0.96.0>, #PID<0.102.0>, #PID<0.106.0>, #PID<0.100.0>]