The song uses moderately complex vocabulary and imagery, such as 'Sintflut' (flood/deluge) and metaphorical references to shadows and monsters, which go beyond basic everyday language. The sentence structures are relatively straightforward and repetitive, making the core content accessible, but the figurative and symbolic language (e.g., 'Zeichen an der Wand', 'Grimassen an jede Wand') requires some interpretive ability typical of B1–B2 learners. The heavy repetition of phrases like 'Schlaf ein' lowers the overall complexity, placing the song solidly at B1.