Gunaa stands out for its intense and unconventional storytelling, blending romance with psychological drama in a manner rarely seen in Tamil cinema of the early 1990s. The screenplay is tightly woven, with a strong emphasis on the protagonist's inner world, which is skillfully portrayed through vivid imagery and symbolic sequences. The pacing is deliberate, allowing the audience to immerse themselves in Gunaa's perspective, especially in the first half, which sets a haunting and immersive tone.

The second half intensifies the emotional stakes, with the narrative exploring darker themes and the consequences of Gunaa's obsession. The film's songs and music, composed by Ilaiyaraaja, are integral to the storytelling, enhancing the emotional depth and complementing the film's mood. The background score is haunting and evocative, effectively underscoring the psychological tension and romantic elements throughout the film.

Cinematography by Venu adds a poetic visual layer, capturing both the beauty and the turmoil of Gunaa's world. The film's blend of artistic visuals, compelling music, and a complex narrative make it a memorable and critically acclaimed work, though its pacing and thematic intensity may not appeal to all viewers.

Kamal Haasan: Delivered a career-defining performance as Gunaa, portraying the character's psychological complexity and emotional vulnerability with remarkable depth and nuance.

Roshini: Played Rohini with grace, effectively conveying innocence and the emotional turmoil caused by Gunaa's obsession.

Rekha: Provided strong support in a pivotal role, adding layers to the narrative.