Haha! I didn’t know either, just figured it involved making words from a word.  Is a good distraction.

Parent, rent, ran, tan, pen

Mountains 

Mount, stain, moan, ants, main

maintenance 

Ante, act, net, tin, teen, ten, tame, can, came, cane, cent

Computers

Put, pets, so, mop, set

airplane

Air, plane, rain, plan, rain

fantastic

Fan, tic tac, ant, as, Stan, cat

animals

Man, alas, am, alms, an

creatures

I finally figured this game out lol

cat, eat, crate, rest, create

monsters