I remember a preceding episode that had Gumby blasting off for a rollicking adventure on a rocket ship, crash landing on the moon, and curling up, despondent, against the wall of a desolate crater. Not seeing the ending here made it all so much worse.
I refuse to watch any part of this but this show gave me nightmares along with Mark Twain and was the creepiest thing on television ever, so here's three stars for that.