Im today finally tested this game on my Steam Deck.
This game is NOT combatible yet, but its does run, but covered up by the Media Player.
The issue is the same as im have on all my games, when using the MUSIC commands.
You need to convert them to samples and uses samples to play the music. You could also load all music in memory at once (as they was a sample), as we have so much memory today to avoid eventuelly delays under loading as well file space.