refine 2048 animations and enhance Dot Link sound effects

2048:
- Improve tile slide animations with distance-proportional timing
- Refactor merge transitions: scale down source tiles before showing merged result
- Extract _paintTile helper to reduce code duplication
- Simplify spawnTile logic by removing unnecessary mergedAt/moves fields

Dot Link:
- Add dynamic pitch variation to path-drawing sounds using plink/plonk SFX
- Rate scales with path length for more engaging audio feedback
- Preload new scifi-plink and scifi-plonk audio assets

public/src/games/2048/2048Game.js

@@ -420,6 +420,7 @@ export default class Game2048 extends Phaser.Scene {
 
     this._animateMove(this.state, newState, () => {
       this.state = newState;
+      this._redrawAllTiles(this.state);
       this._updateScore(newState.score);
 
       if (!this.wonAlready && newState.won) {
@@ -438,27 +439,52 @@ export default class Game2048 extends Phaser.Scene {
     });
   }
 
+  _createFloatingTile(x, y, value) {
+    const CS = this.cellSize - 6;
+    const level = getTileLevel(value);
+    const color = this.tilePalette[level];
+    const textColor = this.tileTextColors[level];
+
+    const g = this.add.graphics().setDepth(D.tiles + 2);
+    g.fillStyle(0x000000, 0.35);
+    g.fillRoundedRect(-CS / 2 + 3, -CS / 2 + 3, CS, CS, 8);
+    g.fillStyle(color, 1);
+    g.fillRoundedRect(-CS / 2, -CS / 2, CS, CS, 8);
+    const sheen = this._mixInts(color, 0xffffff, 0.22);
+    g.fillStyle(sheen, 0.3);
+    g.fillRoundedRect(-CS / 2, -CS / 2, CS, Math.floor(CS * 0.45), 8);
+
+    const log = Math.round(Math.log2(value));
+    const fsMultiplier = (FS_LEVELS[log] ?? 18) / 100;
+    const t = this.add.text(0, 0, String(value), {
+      fontFamily: FONT_TITLE,
+      fontSize: `${Math.floor(this.cellSize * fsMultiplier)}px`,
+      color: textColor,
+    }).setOrigin(0.5).setDepth(D.tiles + 3);
+
+    return this.add.container(x, y, [g, t]).setDepth(D.tiles + 2);
+  }
+
   _animateMove(oldState, newState, onDone) {
-    const SLIDE_MS = 95;
+    const SPAWN_MS = 160;
-    const MERGE_MS = 140;
-    const SPAWN_MS = 115;
 
-    // Phase 1: slide tiles to their new positions
+    const movingEntries = newState.moves.filter(m => m.fromIdx !== m.toIdx);
-    const movesToAnimate = newState.moves.filter(m => m.fromIdx !== m.toIdx);
+    const mergeSet = new Set(newState.mergedAt);
 
-    // For merges, two source tiles go to the same destination.
+    // Hide stationary merge participants so the old value doesn't show while the
-    // We only animate the "first" of a pair (visually one tile slides).
+    // other tile slides in.
-    const seen = new Set();
+    for (const mv of newState.moves) {
-    const uniqueMoves = [];
+      if (mv.fromIdx === mv.toIdx && mergeSet.has(mv.toIdx)) {
-    for (const m of movesToAnimate) {
+        const r = Math.floor(mv.toIdx / 4), c = mv.toIdx % 4;
-      const key = `${m.fromIdx}-${m.toIdx}`;
+        this.tileContainers[r][c].setAlpha(0);
-      if (!seen.has(key)) { seen.add(key); uniqueMoves.push(m); }
+      }
     }
 
     const spawnPhase = () => {
       if (newState.spawned === null) { onDone(); return; }
       const r = Math.floor(newState.spawned / 4), c = newState.spawned % 4;
       const cont = this.tileContainers[r][c];
+      this._paintTile(r, c, newState.grid[newState.spawned]);
       cont.setAlpha(1).setScale(0);
       this.tweens.add({
         targets: cont, scaleX: 1, scaleY: 1,
@@ -468,82 +494,159 @@ export default class Game2048 extends Phaser.Scene {
     };
 
     const afterSlides = () => {
+      if (mergeSet.size === 0) {
         this._redrawAllTiles(newState);
+        spawnPhase();
+        return;
+      }
 
-      if (newState.mergedAt.length === 0) { spawnPhase(); return; }
+      // Build map: merge destination index → moving source containers currently at that position
+      const mergeSources = new Map();
+      for (const mv of movingEntries) {
+        if (!mergeSet.has(mv.toIdx)) continue;
+        if (!mergeSources.has(mv.toIdx)) mergeSources.set(mv.toIdx, []);
+        const fr = Math.floor(mv.fromIdx / 4), fc = mv.fromIdx % 4;
+        mergeSources.get(mv.toIdx).push({ cont: this.tileContainers[fr][fc], fromIdx: mv.fromIdx });
+      }
 
-      let mergePending = newState.mergedAt.length;
+      // Immediately update all tiles that aren't part of a merge transition
-      const afterMerges = () => { mergePending--; if (mergePending === 0) spawnPhase(); };
+      const skipIndices = new Set(newState.mergedAt);
+      for (const srcs of mergeSources.values()) {
+        for (const { fromIdx } of srcs) skipIndices.add(fromIdx);
+      }
+      this._redrawTilesExcept(newState, skipIndices);
 
-      for (const idx of newState.mergedAt) {
+      // Count total source containers across all merges
-        const r = Math.floor(idx / 4), c = idx % 4;
+      let totalSrcs = 0;
-        const cont = this.tileContainers[r][c];
+      for (const srcs of mergeSources.values()) totalSrcs += srcs.length;
-        const mergeVal = newState.grid[idx];
+
-        this._scorePopup(cont.x, cont.y - 40, mergeVal);
+      if (totalSrcs === 0) {
+        this._showMergedTiles(newState, spawnPhase);
+        return;
+      }
+
+      // Scale down all source containers simultaneously (they're at the merge position)
+      let scaledDown = 0;
+      const onAllScaledDown = () => {
+        // Reset every source to its home cell (invisible) before growing merged tiles
+        for (const [, srcs] of mergeSources) {
+          for (const { cont, fromIdx } of srcs) {
+            const { cx, cy } = this._cellCenter(Math.floor(fromIdx / 4), fromIdx % 4);
+            cont.setAlpha(0).setScale(1).setPosition(cx, cy);
+          }
+        }
+        this._showMergedTiles(newState, spawnPhase);
+      };
+
+      for (const [, srcs] of mergeSources) {
+        for (const { cont } of srcs) {
           this.tweens.add({
-          targets: cont, scaleX: 1.2, scaleY: 1.2,
+            targets: cont, scaleX: 0, scaleY: 0,
-          duration: MERGE_MS / 2, ease: 'Quad.easeOut',
+            duration: 120, ease: 'Quad.easeIn',
-          yoyo: true, onComplete: afterMerges,
+            onComplete: () => { scaledDown++; if (scaledDown === totalSrcs) onAllScaledDown(); },
           });
         }
+      }
     };
 
-    let pending = uniqueMoves.length;
+    if (movingEntries.length === 0) { afterSlides(); return; }
-    if (pending === 0) { afterSlides(); return; }
 
-    for (const mv of uniqueMoves) {
+    // Tween actual grid containers to destination positions.
+    // Distance-proportional timing: 1 cell ≈ 200ms, capped at 700ms.
+    let pending = movingEntries.length;
+    for (const mv of movingEntries) {
       const fr = Math.floor(mv.fromIdx / 4), fc = mv.fromIdx % 4;
       const tr = Math.floor(mv.toIdx / 4),   tc = mv.toIdx % 4;
-      const cont = this.tileContainers[fr][fc];
+      const { cx: dstX, cy: dstY } = this._cellCenter(tr, tc);
-      const { cx: tx, cy: ty } = this._cellCenter(tr, tc);
+      const cells = Math.abs(tr - fr) + Math.abs(tc - fc);
+      const duration = Math.min(180 + cells * 200, 700);
       this.tweens.add({
-        targets: cont, x: tx, y: ty,
+        targets: this.tileContainers[fr][fc],
-        duration: SLIDE_MS, ease: 'Quad.easeOut',
+        x: dstX, y: dstY,
+        duration,
+        ease: 'Cubic.easeInOut',
         onComplete: () => { pending--; if (pending === 0) afterSlides(); },
       });
     }
   }
 
-  _redrawAllTiles(state) {
+  _showMergedTiles(newState, spawnPhase) {
-    const CS = this.cellSize - 6;
+    let mergePending = newState.mergedAt.length;
-    const baseLevel = 36;
+    const afterMerges = () => { mergePending--; if (mergePending === 0) spawnPhase(); };
 
-    for (let r = 0; r < 4; r++) {
+    for (const idx of newState.mergedAt) {
-      for (let c = 0; c < 4; c++) {
+      const tr = Math.floor(idx / 4), tc = idx % 4;
-        const val = state.grid[r * 4 + c];
+      const destCont = this.tileContainers[tr][tc];
-        const { cx, cy } = this._cellCenter(r, c);
+      this._paintTile(tr, tc, newState.grid[idx]);
-        const cont = this.tileContainers[r][c];
+      this._scorePopup(destCont.x, destCont.y - 40, newState.grid[idx]);
+      destCont.setAlpha(1).setScale(0);
+      this.tweens.add({
+        targets: destCont, scaleX: 1.2, scaleY: 1.2,
+        duration: 200, ease: 'Back.easeOut',
+        onComplete: () => {
+          this.tweens.add({
+            targets: destCont, scaleX: 1, scaleY: 1,
+            duration: 80, ease: 'Quad.easeOut',
+            onComplete: afterMerges,
+          });
+        },
+      });
+    }
+  }
+
+  _paintTile(r, c, val) {
+    const CS = this.cellSize - 6;
     const gfx = this.tileGraphics[r][c];
     const txt = this.tileTexts[r][c];
+    const level = getTileLevel(val);
+    const color = this.tilePalette[level];
+    gfx.clear();
+    gfx.fillStyle(0x000000, 0.35);
+    gfx.fillRoundedRect(-CS / 2 + 3, -CS / 2 + 3, CS, CS, 8);
+    gfx.fillStyle(color, 1);
+    gfx.fillRoundedRect(-CS / 2, -CS / 2, CS, CS, 8);
+    const sheen = this._mixInts(color, 0xffffff, 0.22);
+    gfx.fillStyle(sheen, 0.3);
+    gfx.fillRoundedRect(-CS / 2, -CS / 2, CS, Math.floor(CS * 0.45), 8);
+    txt.setText(String(val));
+    txt.setColor(this.tileTextColors[level]);
+    const log = Math.round(Math.log2(val));
+    const fsMultiplier = (FS_LEVELS[log] ?? 18) / 100;
+    txt.setFontSize(`${Math.floor(this.cellSize * fsMultiplier)}px`);
+  }
 
+  _redrawTilesExcept(state, skipSet) {
+    for (let r = 0; r < 4; r++) {
+      for (let c = 0; c < 4; c++) {
+        if (skipSet.has(r * 4 + c)) continue;
+        const val = state.grid[r * 4 + c];
+        const cont = this.tileContainers[r][c];
+        const { cx, cy } = this._cellCenter(r, c);
         if (val === 0) {
           cont.setAlpha(0);
           cont.setPosition(cx, cy).setScale(1);
           continue;
         }
         cont.setPosition(cx, cy).setScale(1);
+        this._paintTile(r, c, val);
+        cont.setAlpha(1);
+      }
+    }
+  }
 
-        const level  = getTileLevel(val);
+  _redrawAllTiles(state) {
-        const color  = this.tilePalette[level];
+    for (let r = 0; r < 4; r++) {
-
+      for (let c = 0; c < 4; c++) {
-        gfx.clear();
+        const val = state.grid[r * 4 + c];
-        // Shadow
+        const { cx, cy } = this._cellCenter(r, c);
-        gfx.fillStyle(0x000000, 0.35);
+        const cont = this.tileContainers[r][c];
-        gfx.fillRoundedRect(-CS / 2 + 3, -CS / 2 + 3, CS, CS, 8);
+        if (val === 0) {
-        // Main tile
+          cont.setAlpha(0);
-        gfx.fillStyle(color, 1);
+          cont.setPosition(cx, cy).setScale(1);
-        gfx.fillRoundedRect(-CS / 2, -CS / 2, CS, CS, 8);
+          continue;
-        // Top sheen
+        }
-        const sheen = this._mixInts(color, 0xffffff, 0.22);
+        cont.setPosition(cx, cy).setScale(1);
-        gfx.fillStyle(sheen, 0.3);
+        this._paintTile(r, c, val);
-        gfx.fillRoundedRect(-CS / 2, -CS / 2, CS, Math.floor(CS * 0.45), 8);
-
-        txt.setText(String(val));
-        txt.setColor(this.tileTextColors[level]);
-        const log = Math.round(Math.log2(val));
-        const fsMultiplier = (FS_LEVELS[log] ?? 18) / 100;
-        txt.setFontSize(`${Math.floor(this.cellSize * fsMultiplier)}px`);
-
         cont.setAlpha(1);
       }
     }

public/src/games/2048/2048Logic.js

@@ -55,12 +55,12 @@ export function createState() {
 export function spawnTile(state) {
   const empties = [];
   for (let i = 0; i < 16; i++) if (state.grid[i] === 0) empties.push(i);
-  if (empties.length === 0) return { ...state, spawned: null, mergedAt: [], moves: [] };
+  if (empties.length === 0) return { ...state, spawned: null };
   const idx = empties[Math.floor(Math.random() * empties.length)];
   const val = Math.random() < 0.9 ? 2 : 4;
   const grid = new Int32Array(state.grid);
   grid[idx] = val;
-  return { ...state, grid, spawned: idx, mergedAt: [], moves: [] };
+  return { ...state, grid, spawned: idx };
 }
 
 export function hasValidMoves(state) {
@@ -131,7 +131,7 @@ export function applyMove(state, dir) {
     let srcConsumed = 0;
     for (let di = 0; di < 4 && dstIdx < srcCols.length; di++) {
       if (merged[di] === 0) continue;
-      if (merged[di] === row[srcCols[srcConsumed]] && srcConsumed + 1 < srcCols.length && row[srcCols[srcConsumed]] === row[srcCols[srcConsumed + 1]]) {
+      if (srcConsumed + 1 < srcCols.length && row[srcCols[srcConsumed]] === row[srcCols[srcConsumed + 1]]) {
         // two tiles merged into merged[di]
         movesRotated.push({ fromIdx: r*4+srcCols[srcConsumed], toIdx: r*4+di, value: merged[di] });
         movesRotated.push({ fromIdx: r*4+srcCols[srcConsumed+1], toIdx: r*4+di, value: merged[di] });

public/src/games/dotlink/DotLinkGame.js

@@ -2,7 +2,7 @@ import * as Phaser from 'phaser';
 import { GAME_WIDTH, GAME_HEIGHT, COLORS } from '../../config.js';
 import { Button } from '../../ui/Button.js';
 import { MusicPlayer } from '../../ui/MusicPlayer.js';
-import { playSound, SFX } from '../../ui/Sounds.js';
+import { playSound, SFX, playDotLinkSound, playScifiLaunch } from '../../ui/Sounds.js';
 import { api } from '../../services/api.js';
 import {
   makeRng, dateSeed, localDateString, generateBoard, isSolved, manhattanAdjacent,
@@ -770,7 +770,7 @@ export default class DotLinkGame extends Phaser.Scene {
       const target = start === this.endA[ec] ? this.endB[ec] : this.endA[ec];
       this.draw = { color: ec, target };
       this.drawing = true;
-      playSound(this, SFX.PIECE_CLICK);
+      playDotLinkSound(this, ec, 1);
       this.redrawPaths();
       return;
     }
@@ -834,7 +834,7 @@ export default class DotLinkGame extends Phaser.Scene {
       this.drawing = false;
       this.redrawPaths();
       this.pulseCell(next, FLOW[k % FLOW.length].n);
-      playSound(this, SFX.CARD_PLACE);
+      playScifiLaunch(this);
       this.checkWin();
       return true;
     }
@@ -855,6 +855,7 @@ export default class DotLinkGame extends Phaser.Scene {
     this.owner[next] = k;
     path.push(next);
     this.redrawPaths();
+    playDotLinkSound(this, k, path.length);
     return true;
   }
 

public/src/scenes/PreloadScene.js

@@ -112,6 +112,8 @@ export default class PreloadScene extends Phaser.Scene {
     this.load.audio('sfx-scifi-riser',   '/assets/fx/scifi-riser.mp3');
     this.load.audio('sfx-scifi-reveal',  '/assets/fx/scifi-reveal.mp3');
     this.load.audio('sfx-scifi-woosh',   '/assets/fx/scifi-woosh.mp3');
+    this.load.audio('sfx-scifi-plink',   '/assets/fx/scifi-plink.mp3');
+    this.load.audio('sfx-scifi-plonk',   '/assets/fx/scifi-plonk.mp3');
 
     this.load.spritesheet('catan-special-cards', '/assets/images/catan-special-cards.png', { frameWidth: 270, frameHeight: 390 });
 

public/src/ui/Sounds.js

@@ -32,6 +32,8 @@ export const SFX = {
   SCIFI_RISER:           'sfx-scifi-riser',
   SCIFI_REVEAL:          'sfx-scifi-reveal',
   SCIFI_WOOSH:           'sfx-scifi-woosh',
+  SCIFI_PLINK:           'sfx-scifi-plink',
+  SCIFI_PLONK:           'sfx-scifi-plonk',
   SWORD_HIT:             'sfx-sword-hit',
   SWORD_SLICE:           'sfx-sword-slice',
   MONOPOLY_PURCHASE:     'sfx-monopoly-purchase',
@@ -93,3 +95,12 @@ export function playScifiWoosh(scene) {
   _scifiWooshSound = scene.sound.add(SFX.SCIFI_WOOSH);
   _scifiWooshSound.play();
 }
+
+// Dot Link: plink/plonk with adjustable rate — even colour index → plink, odd → plonk
+export function playDotLinkSound(scene, colorIdx, pathLength) {
+  const soundKey = colorIdx % 2 === 0 ? SFX.SCIFI_PLINK : SFX.SCIFI_PLONK;
+  const rate = 1 + (pathLength - 1) * 0.5;
+  const sound = scene.sound.add(soundKey);
+  sound.setRate(rate);
+  sound.play();
+}