From GameBrew - a wiki dedicated to Video Game Homebrew.
15-16 Puzzle is an adaptation of a classic sliding puzzle game 15 puzzle. The game has simple graphics, a stopwatch and an indicator of of your record time.
It is a sliding puzzle game with 15 square tiles numbered 1–15 in a frame that is 4 tiles high and 4 tiles wide, leaving one unoccupied tile position.
Tiles in the same row or column of the open position can be moved by sliding them horizontally or vertically, respectively.
The goal of the puzzle is to place the tiles in numerical order.
Stylus - Move pieces
Start - Reset the puzzle and start again if you stop
Tested on Flashcart SuperCard DSTwo with EvolutionOS Kernel Version 1.09.