In the early stages (Prologue and Chapter 1), certain choices help establish your character's persona:
Prologue. Go left. ...Setsuna. I'm Sanzenkai Setsuna. / Try guessing my name! / Don't go falling for me! Get ready for a showdown. Steam Community ISLAND Walkthrough - Guide - Steam Community
: Conclude the sequence with "No need to mention it". Prologue Key Decisions
: You can choose between "Flirting with Kuon" or "Minding your place," which may impact future branching paths not yet fully realized in v0.3.2. Technical Details (APK) Platform : Android. Format : APK (Android Package Kit) for manual installation. Genre : Role-Playing / Visual Novel. ISLAND Walkthrough - Guide - Steam Community
: Select "I can't die for her" during critical danger scenes.
: Progress is primarily driven by dialogue choices that determine your relationship with the island's inhabitants, specifically the key character, Sara.