Metacritic reviews

Sensitive music by Mr. Pintoff and some wonderfully wry dialogue, subtly laced with motivations, top off this animated jewel.

Jolly sequel to the superior The Mouse That Roared, which flaunted a Peter Sellers tour de force. This returns to the little Duchy of Fenwick, where the inhabitants - by virtue of their wine, which makes rocket fuel of a rare vintage - beat the superpowers to the moon. [04 Mar 2006, p.53]

Peter Sellers, whose multiple role-playing sustained the earlier picture, is sadly missing here as the citizens of Grand Fenwick enter the space race. But a dull script is considerably enlivened by some inventive touches from Richard Lester, directing his first big-budget film, and he went straight on to A Hard Day's Night and The Knack. [15 Jul 2007, p.18]

This adaptation of Leonard Wibberley's novel, and sequel to The Mouse That Roared satirises the space war, Cold War and politics to varied effect. [07 Dec 2013, p.40]

This doesn't come close to the original in wit, style, or farce, although if the former had never been made, THE MOUSE ON THE MOON could weakly stand on its own as a mild comedy.