Waza KD Tetris

KD-Tetris: TypeScript/Vite Tetris implementing full guideline mechanics — SRS rotation w/ wall kicks, DAS/ARR movement, hold, ghost piece. Headless core module (runs in Node, testable) decoupled from Canvas renderer and keyboard input layer. Three modes incl. BALANCE (center-of-mass physics, board tilts/topples). Web Audio synth engine drives adaptive background score reacting to board state. localStorage scoreboard, dual Night/Day theme shells.