Phase 4: Auto-Battle, UI & Save

Depends on: Phase 3 (combat must work).

#	System	Notes
20	Auto-Battle	Hero follows main road, engages enemies, collects gold, continues. Core idle loop.
21	Manual Navigation	Tap-to-move off the main path. Toggle auto-retaliate. Active play.
22	Vendor / Shop	Buy weapons, armor, HP potions with gold. Flat list, gated by cost.
23	HUD	Collapsable menu bar at bottom of screen. Toggle button expands to Inventory, Equipment, Skills.
24	Menu Panels	Inventory, Equipment Slot, and Skills panels. One open at a time.
25	Checkpoint System	Checkpoint at start of each level. Unlock by interaction. Teleport between checkpoints.
26	Save System	localStorage. Auto-save every 30s + key events. Schema versioning with migrations.

System Details

Click any system above for the full implementation guide including Koota traits, file structure, implementation steps, and beta references.