From Super Mario Bros series Chain Chomp and bricks made entirely in geometry nodes Didnt had much of an idea for backdrop, therfore went with kinda Bob-omb Battlefield
Cleaner render
Jaws can be moved with single variable within nodes
Earlier version
How cool!, I like it, I have not experienced very much with geo nodes but after seeing your post I surely will.
I featured you on BlenderNation, have a great weekend!