From GameBrew - a wiki dedicated to Video Game Homebrew.
Flock is a casual two dimensional puzzle game, with a top down perspective, using collision detection, sprite rotation; multiple backgrounds coded entirely using C, using the DS homebrew libraries of PA_lib & ndslib.
Use the Stylus to direct birds to the goal, a red star. You can place four arrows to redirect the birds. A.I. opponents also use arrows to redirect birds to their star.
It is a quick game with only three rounds, per game, running at a hectic pace.
The puzzle mode gives you a set of arrows with the objective of directing all the birds and avoiding all the hazards.
Stylus - Choose option (menu), Place arrows (in game)
Start - Pause
Select - Back to menu (during pause)
DSTT/TTDS (firmware 1.17)
R4i SDHC Revolution (firmware 2.7b)