From GameBrew - a wiki dedicated to Video Game Homebrew.
CrystalChase DS is a simple homebrew puzzle game for the NDS.
Download and extract file.
The goal is to clear the crystals on the game field.
Tap on a group of 2 or more crystals of the same color to make them disappear. The game ends when there are no more possible groups and you will have to start over from the first level.
Stylus - Eliminate crystals
A - Go to the next level