Vivarium puts the small life a real place has into a GameMaker room, chosen by what the room is. Butterflies and bees over grass, dragonflies and pond skaters over water, frogs on the bank that dive when the player comes near, fish under the surface.
You answer three questions about a tile and it works out the water, the ground and the shore itself. It fills the view when a room appears and thins or tops it up as the player walks.
Time of day changes the cast. Moths circle the player's lamp at dusk, fireflies of one kind flash in waves, bats swoop at night.
43 species in 9 families, every wing, fin and leg drawn by the package frame by frame. Pure GML. The code and graphics are AI generated. $12.99.