Rune Grove

Genre: Offline Grid Merge and Evolution Puzzle. Gameplay: Spatial 4x4 grid puzzle where players place and merge matching runes. - Four by four spatial grid where players plant incoming runes onto open soil plots. - Seven-tier evolution progression spanning from Mystic Seed to Sacred World Tree. - Adjacency cluster detection algorithm merging three or more matching runes into higher tiers. - Thorn Sprite hazard entity operating a four-state finite state machine. - Blight Bramble plot corruption requiring adjacent fusions or cleansing abilities to clear. - Three power-up abilities: Prismatic Wildcard, Solar Purify, and Verdant Boost. - Turn-based combo multiplier system rewarding consecutive merge fusions. - Particle engine producing spore bursts, petal fountains, and fusion cleansing waves. - Camera shake and haptic feedback triggered on tile merges, blight spread, and tier evolutions. - Procedural audio synthesizer using Android AudioTrack playing harmonic chords and chime loops. - Animated splash screen featuring sprout logo scaling and alpha fade transitions. - Main menu screen displaying highest tier unlocked and total grove fusions. - How-to-play screen explaining rune tiers, merge combinations, and blight rules. - Settings screen with toggles for audio sound effects, background music, and haptic feedback. - Heads-up display showing the 4x4 grid, next rune preview card, ability buttons, and pause trigger. - Pause overlay dialog offering resume, reseed grove, settings navigation, and menu return. - Level complete screen celebrating tier evolution with star ratings and fusion statistics. - Game over screen displaying highest tier reached, final harmony score, and retry options. - About screen displaying version 20.20.20 and offline privacy policy information. - In-memory session storage without SharedPreferences or network connectivity. - Pure native Java architecture using SurfaceView, Canvas, and standard Android XML layouts.