From GameBrew - a wiki dedicated to Video Game Homebrew.
Ball Buster! is a DS homebrew puzzle game that combines elements from bubble popper, bubble buster and ball shooter games.
The goal is to empty the screen that is filled with colored balls.
Collect the balls in color groups (pair, trios, etc) to make them bust and disappear. Gather bigger groupings for bonus points.
Stylus - Start game, Select group of balls, Accept
L - Restart game
Start - Reset game (at Game Over screen)
A - OK
B - Cancel
Tested on Real M3DS Flash card with Firmware V4.7 X.