There are some nice little games and demo applications for your entertainment. Most of the demos are targeted to developers who are interested in learning from the code, which is of course open source as is everything Haiku.

BSnow		Let it snow.
Chart		Moving through stars and galaxies.
Clock		An analog clock.
Cortex		See the media_server in action.
FontDemo		A slideshow through all your fonts.
GLDirectMode		A demonstration of OpenGL.
GLTeapot		The rotating OpenGL rendered teapot.
Gradients		A demonstration of the gradient API .
Mandelbrot		Computing fractals.
Pairs		A game to find pairs of matching icons.
Playground		Test the drawing API .
Pulse		See your CPU's workload.
Sudoku		This century's "Solitair".