The hang appears after around a minute from the first cutscene (map ID 3), it will teleport to the next map (ID 2) which shows "EPISODE 1", plays some audio garbage (probably unrelated) in loop and there is no advance or keypress to skip this scene.
Direct access to the hang: --start-map-id 2 --new-game
--start-map-id 2 --new-game
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The interpreter gets stuck in this loop
Branch if BGM has Played Once
Play BGM "(OFF)"
This conditional state hasn't been implemented yet.
Warn about unimplemented conditional branch flags. Return always true…
… for "BGM looped once" (see #655)
For a SDL_Mixer music loop check workaround, click the picture to play a video with a code example:
zegeri fixed this one