Changing the size of memory or changing the ROM version forces a reset of the PET.
The emulator has an IEEE-488 device at address 8. It can be used load and save (.prg) files.
Some programs don't run on ROM1 and some require more memory than the default 8K.
In FERRY, you move your ship (>) from the left side of the screen to the right while dodging a field of upwardly-scrolling dots. On the easiest level, you start near the top of the screen, which gives you a lot of time to see what's coming; on higher levels, you begin closer to the bottom, making your journey significantly more difficult.