Bunny Madness is a tiny metroidvania inspired by Animal Well — made by a dad and his five-year-old son as a way to learn programming together. A pink bunny falls down the rabbit hole under a big tree and finds five tools that bend the world: a UV light that reveals invisible bridges, a bouncy ball that bonks far-away buttons, a remote control for locked doors, a laser for cracked rocks, and a bubble wand that blows platforms you can ride. Feed the hungry guard, win the BRICK BONK arcade cabinet, beat four flame guardians, light the altar, defeat the EVIL BUNNY — then carry the pink flame home to light the campfire and start the greatest bunny dance party ever. Touch a telephone to save. There are three save slots, and in the browser they only last as long as the tab stays open.

Beating the game a certain way starts a second game. The bunnies hide down the rabbit hole, the world becomes hide and seek, and a new boss waits at the tree once everyone is home. She needs all five tools to beat.

The whole game is designed to be edited by a five-year-old: every room is a drawing made of typed letters, every sprite is a small grid of color codes, and the tunable numbers live under a comment that says TRY CHANGING THESE NUMBERS! A suite of robot bunnies plays the game headlessly to prove nobody can get stuck and both endings are always reachable. Free software under the GPL, on GitHub.