Neon Plane Battle Pro

Plane War is a precision-engineered vertical shoot-em-up built on three principles: zero permissions, total offline operation, and bilingual accessibility.

ARCHITECTURE
- Native SwiftUI for menus and overlays, SpriteKit for the game scene
- 60 fps update loop with name-prefix node filtering for cheap collision queries
- Local UserDefaults persistence (Documents not used)
- iPhone portrait only, iOS 17.0 minimum

CORE LOOP
- Tap Start Mission, full-screen drag controls plane position
- Auto fire every 0.2 seconds with weapon-specific spawn patterns
- Enemy waves spawn every 10 seconds with mixed Scout, Striker, Tank composition
- Boss every 22 seconds, drops weapon upgrade on defeat
- Stage advances automatically with banner display

WEAPONS (FOUR PATTERNS)
- Pulse: single forward projectile, base damage
- Spread: three-way fan, wider clear range
- Laser: continuous beam, high DPS against high HP enemies
- Homing: tracking projectile, autonomous target acquisition

LOCAL STATS
- Games played, High Score, Farthest Stage, Enemies Defeated, Bosses Defeated
- All five fields persist across launches
- Reset Progress flow with explicit confirmation dialog

INTERNATIONALIZATION
- English (en) and Simplified Chinese (zh-Hans) bundled
- 33 localized keys, run-time switchable via UserDefaults app.language

PRIVACY AND COMPLIANCE
- No network entitlements, no third-party SDKs
- No NSUsageDescription keys in Info.plist (no camera, mic, photos, location)
- No analytics, no crash reporting, no remote configuration
- All data stays on device

Built for players who demand transparency, control, and immediate action.