Unseen graphics

[A.K.]

Apparently, before Commander Keen in "Goodbye Galaxy" was released, the Hillville level had little guys who went around kicking everything in their path (hence "Welcome to a kick in the pants down in good ol' Hillville").
Do any graphics of these mysterious critters (and any others who never made it into the released version) exist somewhere, for Keensters like me to have a look at?