Complete playthrough. Coming from having just played Super Castlevania IV, the limitations of the GB platform really show themselves here - Castlevania: The Adventure, while having a few sequences of quite interesting level design, such as with the third level's spiked raising floor/spiked ceiling sequences, feels very slow and clunky to play. It's also (perhaps mercifully!) very short, with only four levels - albeit the difficulty tends towards series' punishing nature, so I imagine that getting through those levels successfully could take quite a while without the luxury of save states. Ultimately, from a modern perspective this is only really worth playing for historical interest.