Ian Inglis views "Wonderwall Music" as "an assured and varied collection of music that ... perfectly complemented the juxtaposition of the exotic and the ordinary that Massot's film depicted". Among the selections he highlights as transcending their soundtrack role, Inglis describes "Microbes" as "a beautiful example of Harrison's ability to create forlorn, mournful, yearning soundscapes" and "Greasy Legs" as "a delicate and charming composition". Inglis concludes of Harrison's debut solo album: "it provides a fascinating summary of the myriad patterns of musical activity whose fusions stimulated the growth of psychedelic, underground, and progressive scenes in the late 1960s, and it is a key moment in the development of his preparations for life after the Beatles."