En Annan delivers a compelling narrative that balances drama and action, characteristic of Tamil cinema in the 1970s. The screenplay is straightforward, focusing on strong character arcs and moral conflicts. The pacing is steady, with the first half establishing the characters and their motivations effectively, while the second half intensifies the drama and action sequences, maintaining audience engagement throughout.

The film's songs and music, though not credited here, traditionally play a significant role in enhancing the emotional tone and cultural setting. The background score complements the narrative, underscoring moments of tension and sentiment without overpowering the scenes. Overall, the film's technical aspects, including cinematography and production design, support the storytelling, though detailed credits are unavailable.

While the film may feel conventional by modern standards, it remains a notable example of its era's cinematic style, driven by strong performances and a clear moral message.

M. G. Ramachandran: Charismatic and commanding, delivering the hero's role with conviction and emotional depth.

Jayalalithaa J: Graceful and expressive, providing a strong female presence that complements the lead.

M. N. Nambiar: Effective as the antagonist, bringing intensity and menace to the role.