At this point I've got the speed of the fighters increased by about 33%, I have four normal fighters and two distinct red-coloured fighters, the TIE fighter attack music from A New Hope playing (instead of the generic combat music), new sounds for interceptors blowing up and your turrets now sound like the Millenium Falcon's. The best way to have the minigame affected by difficulty appears to be to duplicate the minigame module and adjust these copies with personalised hp, damage, number of fighters etc. I would then adjust the galaxmap and galaxymap scripts so that you are loaded into an instance of the minigame module based on what difficulty setting you have.
Something I am having trouble with is triggering scripts to play sounds. What I would like to do is play a ratcheting gear sound when your turret turns (https://www.youtube.com/watch?v=LwiOCsfa_ZA) and have TIE fighter flyby sounds (https://www.youtube.com/watch?v=izZm4oYpLCc) play as they go past you, but I'm struggling to find a trigger that will run the sound-playing scripts I've written. Anyone aware of how to trigger these scripts within the minigame? I've tried using other script triggers mentioned in the .are (heartbeat, onfire, I tried adding values to the engine field under sounds, no luck). Any ideas?