This updated walkthrough covers all of the current (as of August 2023) menus available for altering behavior of the gpstar hardware by @MichaelRajotte. From the two EEPROM menus which alter defaults and system settings to the runtime menus which affect audio and behavior, nearly every aspect of your pack and wand can be controlled without modifying any of the software--and stores certain preferences across power-downs and future upgrades.
New features include "Spectral" modes which make use of the RGB lighting upgrades by @fruttotechnology for the Powercell and Cyclotron. Built-in modes showcase the full color gamut possible for these devices, including a custom mode which allows you to set your own color preferences for the powercell, inner/outer cyclotron, and wand barrel (while firing)!