Muni offers a unique blend of horror and comedy, which was relatively fresh for Tamil cinema at the time of its release. The content balances scares with humor, though the screenplay tends to rely heavily on formulaic tropes common in the genre. The pacing is uneven; the first half establishes the characters and sets up the supernatural premise with a mix of light-hearted moments and suspense, while the second half intensifies the horror elements and action sequences, though it occasionally drags.

The songs and music composed by Bharadwaj and S.P. Venkatesh complement the film's mood, with catchy tunes that fit well within the narrative. The background score effectively heightens the tension during horror sequences and supports the comedic timing, enhancing the overall viewing experience. Cinematography by K. V. Guhan captures the eerie atmosphere suitably, contributing to the film's spooky ambiance.

While the screenplay could have been tighter, the film's entertainment quotient is boosted by its engaging performances and the director's attempt to merge two contrasting genres. The film's mix of horror and comedy paved the way for similar genre blends in Tamil cinema in subsequent years.

Raghava Lawrence: Delivers a convincing performance balancing comedy and horror, effectively portraying a man caught between the living and the supernatural.

Rajkiran: Provides a strong supporting role with a commanding presence, adding emotional depth to the story.

Kovai Sarala: Offers comic relief with her timing and expressions, contributing to the film's lighter moments.