Powder is a fast-paced roguelike game designed to be played on a Gameboy Advance. Rogue Class Linux has 2 versions of Powder. The keyboard version works as the author intended it to work on a computer. The joystick version works as the author intended it to work on a GBA or similar handheld game console. If in doubt, then use the keyboard version.
Powder is graphical by default. To use text characters, click Menu, click Options, click Tiles, and Click Graphical ASCII.
Powder saved games are stored in /home/rogue/.powder/ and /home/rogue/.powder-joystick/
You can find more information about powder at http://www.zincland.com/powder/