Added new level sound

src/gameplay/core/Game.cpp

@@ -57,6 +57,9 @@ void Game::reset(int startLevel_) {
     // Initialize gravity using NES timing table (ms per cell by level)
     gravityMs = gravityMsForLevel(_level, gravityGlobalMultiplier);
     fallAcc = 0; gameOver=false; paused=false;
+    hardDropShakeTimerMs = 0.0;
+    hardDropCells.clear();
+    hardDropFxId = 0;
     _startTime = SDL_GetPerformanceCounter();
     _pausedTime = 0;
     _lastPauseStart = 0;
@@ -328,6 +331,25 @@ void Game::softDropBoost(double frameMs) {
     (void)frameMs;
 }
 
+void Game::updateVisualEffects(double frameMs) {
+    if (frameMs <= 0.0) {
+        return;
+    }
+
+    if (hardDropShakeTimerMs <= 0.0) {
+        hardDropShakeTimerMs = 0.0;
+        if (!hardDropCells.empty()) {
+            hardDropCells.clear();
+        }
+        return;
+    }
+
+    hardDropShakeTimerMs = std::max(0.0, hardDropShakeTimerMs - frameMs);
+    if (hardDropShakeTimerMs <= 0.0 && !hardDropCells.empty()) {
+        hardDropCells.clear();
+    }
+}
+
 void Game::hardDrop() { 
     if (paused) return;
     // Count how many rows we drop for scoring parity with JS
@@ -337,7 +359,34 @@ void Game::hardDrop() {
     if (rows > 0) {
         _score += rows * 1;
     }
-    lockPiece(); 
+    hardDropCells.clear();
+    hardDropCells.reserve(8);
+    for (int cy = 0; cy < 4; ++cy) {
+        for (int cx = 0; cx < 4; ++cx) {
+            if (!cellFilled(cur, cx, cy)) {
+                continue;
+            }
+            int gx = cur.x + cx;
+            int gy = cur.y + cy;
+            if (gx < 0 || gx >= COLS || gy >= ROWS) {
+                continue;
+            }
+            if (gy >= 0) {
+                hardDropCells.push_back(SDL_Point{gx, gy});
+            }
+        }
+    }
+
+    ++hardDropFxId;
+    lockPiece();
+    hardDropShakeTimerMs = HARD_DROP_SHAKE_DURATION_MS;
+}
+
+double Game::hardDropShakeStrength() const {
+    if (hardDropShakeTimerMs <= 0.0) {
+        return 0.0;
+    }
+    return std::clamp(hardDropShakeTimerMs / HARD_DROP_SHAKE_DURATION_MS, 0.0, 1.0);
 }
 
 void Game::rotate(int dir) {

src/gameplay/core/Game.h

@@ -74,6 +74,13 @@ public:
     double getFallAccumulator() const { return fallAcc; } // Debug: time accumulated toward next drop
     void setLevelGravityMultiplier(int level, double m);
 
+    // Visual effect hooks
+    void updateVisualEffects(double frameMs);
+    bool hasHardDropShake() const { return hardDropShakeTimerMs > 0.0; }
+    double hardDropShakeStrength() const;
+    const std::vector<SDL_Point>& getHardDropCells() const { return hardDropCells; }
+    uint32_t getHardDropFxId() const { return hardDropFxId; }
+
 private:
     std::array<int, COLS*ROWS> board{}; // 0 empty else color index
     Piece cur{}, hold{}, nextPiece{};   // current, held & next piece
@@ -109,6 +116,12 @@ private:
     // Backwards-compatible accessors (delegate to gravityMgr)
     double computeGravityMsForLevel(int level) const;
 
+    // Impact FX timers
+    double hardDropShakeTimerMs{0.0};
+    static constexpr double HARD_DROP_SHAKE_DURATION_MS = 320.0;
+    std::vector<SDL_Point> hardDropCells;
+    uint32_t hardDropFxId{0};
+
     // Internal helpers ----------------------------------------------------
     void refillBag();
     void spawn();