Play a Doom WAD in the terminal.
mix doom --wad DOOM1.WAD
mix doom --wad DOOM1.WAD --level E1M3 --skill 4--wad defaults to config :elixir_doom, :wad (which DOOM_WAD sets), then the DOOMWADDIR directory's
DOOM1.WAD or DOOM.WAD. --skill is 1 (I'm too young to die) to 5 (Nightmare),
default 3. --level defaults to the WAD's first. --picture (or CAULDRON_PICTURE) is how the picture
reaches a terminal that keeps images, as Cauldron2D.Drafter.Client.Picture reads it:
any of native, native:N, size:WxH, png and swap, comma separated, or
none; default native:2,swap. --mute plays no sound
(CAULDRON_MUTE=1 too).