diff --git a/jsm/Stats.js b/jsm/Stats.js
index f43b91c..efdbf0a 100644
--- a/jsm/Stats.js
+++ b/jsm/Stats.js
@@ -183,7 +183,7 @@ class Stats {
 
         if (this.speechSynthesisAvailable && this.settings.sfxVolume) {
             if (tSpin) this.speak(tSpin, this.settings.sfxVolume);
-            if (nbClearedLines) this.speak(CLEARED_LINES_NAMES[nbClearedLines], this.settings.sfxVolume);
+            if (nbClearedLines > 1) this.speak(CLEARED_LINES_NAMES[nbClearedLines], this.settings.sfxVolume);
         }
 
         this.goal -= awardedLineClears
diff --git a/jsm/Tetrominoes.js b/jsm/Tetrominoes.js
index d79bf39..551b4a4 100644
--- a/jsm/Tetrominoes.js
+++ b/jsm/Tetrominoes.js
@@ -172,7 +172,7 @@ InstancedMino.prototype.materials = {
         envMap: environment,
         side: THREE.DoubleSide,
         transparent: true,
-        opacity:   0.85,
+        opacity:   0.66,
         roughness: 0.01,
         metalness: 0.99,
     })
@@ -509,7 +509,7 @@ class Playfield extends THREE.Group {
           new THREE.PlaneGeometry(COLUMNS, SKYLINE),
           new THREE.MeshStandardMaterial({
               color: 0xc5d0a1,
-              roughness: 0.9,
+              roughness: 0.1,
               metalness: 0.9,
           })
         )