From GameBrew - a wiki dedicated to Video Game Homebrew.
PaDS is a button-tapper for the NDS. It is game of reflexes and speed in which you must press the requested keys as quickly as possible.
Random sequences of button will be shown on the top screen in 60 seconds and you need to press the requested buttons in order to ontain points.
D-Pad or A/B/Y/X or L/R - Sequence of the top screen
R4 SDHC (firmware 1.31)
NDSTT (firmware 1.17a12)