Glarf is the working title of a video game. It is a platformer like Mario or MegaMan or Contra, but that's not the Big Idea.
The Big Idea is user created content, radical trust, randomness, and play. Weapon crafting is a key example.
Glarf can shoot things - fireballs, bouncy globs, liquids. When Glarf consumes a powerup, the things he shoots inherit some of that powerup's properties, by being selective in what you eat or throw away, you can create weapons with powerful and interesting effects.
Eventually, players will be able to modify the code that governs the behaviour of object in the game world. And they'll be able to share it safely with other players. But for now we're just working on getting a first level done that serves as a tutorial and is still fun.
