This is typical 1950s/60s sci-fi stuff, with the ending sort of pinched from War Of The Worlds. Harryhausen’s monsters are perhaps not as threatening as in the Sinbad movies or Jason and the Argonauts, with the only real threat being the brief scene with a giant caterpillar-like moon cow. The other creatures created by Harryhausen are the insect like moon people called the Selenites.
The film is interesting and entertaining and a faithful adaptation of H.G. Wells’ work, but it is a change of pace from Ray Harryhausen’s usual film making magic.