A sliding tile puzzle. The image, "Lena" is famous for its use in testing scanning and image compression.
 

Perq-Man! A clone of Pac-Man. (Unfortunately it crashes on the emulator)

There are also a number of small demo apps. Ooooh, pogo mice! They seem to like bouncing things around on the screen a lot.

There is a large looping demo that demonstrates some of the things the Perq's graphics hardware is capable of.

This is the title screen.