Rune Catalyst Forge

Rune Catalyst Forge is an offline tactical sliding tile puzzle game created in pure Java for Android.

Gameplay Features:
- 4x4 grid board supporting four-directional swipe inputs (Up, Down, Left, Right)
- Slide physics moving all eligible rune tiles toward the swiped direction
- Merge mechanic combining two runes of equal rank into a higher tier relic
- Seven distinct elemental rune tiers with unique color palettes and visual glyphs
- Automated random tile generation in empty grid positions after each valid swipe
- Score accumulation based on the rank value of synthesized runes
- Consecutive merge combo multiplier system resetting on non-merging swipes
- Particle sparks and burst animations rendered at merge grid locations
- Game over detection when all sixteen grid cells are filled with no valid moves

Audio & Feedback:
- Real-time procedural audio synthesis generated via AudioTrack
- Custom acoustic feedback for tile slide, rune merge, combo streak, and game over
- Procedural background music with persistent state settings
- Haptic feedback pulses on tile combinations and high-tier merges

Game Modes & Interface:
- Splash screen with game title and engine initialization
- Main menu with play button, tutorial access, audio controls, and about dialog
- How to Play screen explaining swipe mechanics and rune fusion tiers
- Settings screen allowing independent toggles for SFX, music, and haptics
- Pause dialog to pause grid timer and view current session statistics
- Game Over screen displaying total score and highest forge achievement
- Level Complete screen with score breakdown
- About screen displaying exact version number, package name, and build metadata