diff --git a/app.js b/app.js
index c79ec98..b47fb31 100644
--- a/app.js
+++ b/app.js
@@ -135,7 +135,7 @@ let game = {
         window.onblur = null
         renderer.domElement.onfocus = null
         menu.settings.domElement.onfocus = null
-        game.playing = false
+        this.playing = false
         scene.music.pause()
         stats.clock.stop()
         messagesSpan.addNewChild("div", { className: "show-level-animation", innerHTML: `<h1>GAME<br/>OVER</h1>` })
@@ -347,5 +347,5 @@ window.addEventListener("resize", () => {
 window.onbeforeunload = function (event) {
     menu.save()
     localStorage["teTraHighScore"] = stats.highScore
-    return !game.playing
+    if (game.playing) return false;
 }
\ No newline at end of file
diff --git a/jsm/TetraScene.js b/jsm/TetraScene.js
index 8222388..c359fe9 100644
--- a/jsm/TetraScene.js
+++ b/jsm/TetraScene.js
@@ -47,8 +47,8 @@ export class TetraScene extends THREE.Scene {
     set theme(theme) {
         switch (theme) {
             case "Plasma":
-                this.ambientLight.intensity     = 0.6
-                this.directionalLight.intensity = 11
+                this.ambientLight.intensity     = 0
+                this.directionalLight.intensity = 1.75
                 this.directionalLight.position.set(5, -20, 20)
                 break
             case "Espace":
diff --git a/jsm/Tetrominoes.js b/jsm/Tetrominoes.js
index 000cb81..dc2d6af 100644
--- a/jsm/Tetrominoes.js
+++ b/jsm/Tetrominoes.js
@@ -75,23 +75,6 @@ export class InstancedMino extends THREE.InstancedMesh {
         const roundedBoxGeometry = new RoundedBoxGeometry(1.03, 1.03, 1.03, 4, 0.15)
         roundedBoxGeometry.translate(0.5, 0.5, 0)
         super(roundedBoxGeometry, undefined, 2*ROWS*COLUMNS)
-        this.roundedBoxGeometry = roundedBoxGeometry
-        let minoFaceShape = new THREE.Shape()
-        minoFaceShape.moveTo(.1, .1)
-        minoFaceShape.lineTo(.1, .9)
-        minoFaceShape.lineTo(.9, .9)
-        minoFaceShape.lineTo(.9, .1)
-        minoFaceShape.lineTo(.1, .1)
-        let minoExtrudeSettings = {
-            steps: 1,
-            depth: .8,
-            bevelEnabled: true,
-            bevelThickness: .1,
-            bevelSize: .1,
-            bevelOffset: 0,
-            bevelSegments: 1
-        }
-        this.extrudeGeometry = new THREE.ExtrudeGeometry(minoFaceShape, minoExtrudeSettings)
         this.offsets = new Uint8Array(2*this.count)
     }
 
@@ -99,14 +82,14 @@ export class InstancedMino extends THREE.InstancedMesh {
         if (theme == "Rétro") {
             this.resetColor()
             this.update = this.updateOffset
-            this.geometry = this.extrudeGeometry
             if (this.materials["Rétro"]) {
                 this.material = this.materials["Rétro"]
             } else {
                 this.materials["Rétro"] = []
                 const loadingManager = new THREE.LoadingManager(() => this.material = this.materials["Rétro"])
                 new THREE.TextureLoader(loadingManager).load("images/sprites.png", (texture) => {
-                    this.materials.Rétro[0] = this.materials.Rétro[2] = new TileMaterial({
+                    this.materials.Rétro[4] =
+                    this.materials.Rétro[5] = new TileMaterial({
                         color: COLORS.RETRO,
                         map: texture,
                         bumpMap: texture,
@@ -117,7 +100,10 @@ export class InstancedMino extends THREE.InstancedMesh {
                     }, 8, 8)
                 })
                 new THREE.TextureLoader(loadingManager).load("images/edges.png", (texture) => {
-                    this.materials.Rétro[1] = this.materials.Rétro[3] = this.materials.Rétro[4] = this.materials.Rétro[5] = new TileMaterial({
+                    this.materials.Rétro[0] =
+                    this.materials.Rétro[1] =
+                    this.materials.Rétro[2] =
+                    this.materials.Rétro[3] = new TileMaterial({
                         color: COLORS.RETRO,
                         map: texture,
                         bumpMap: texture,
@@ -129,7 +115,6 @@ export class InstancedMino extends THREE.InstancedMesh {
                 })
             }
         } else {
-            this.geometry = this.roundedBoxGeometry
             this.update = this.updateColor
             this.material = this.materials[theme]
         }
diff --git a/jsm/Vortex.js b/jsm/Vortex.js
index dd2da80..28e4d75 100644
--- a/jsm/Vortex.js
+++ b/jsm/Vortex.js
@@ -47,7 +47,7 @@ export class Vortex extends THREE.Group {
                     texture.repeat.set(1, 2)
                     this.darkCylinder.material.map = texture
                 })
-                this.darkCylinder.material.opacity = 0.05
+                this.darkCylinder.material.opacity = 0.14
 
                 new THREE.TextureLoader(this.loadingManager).load("./images/plasma2.jpg", texture => {
                     texture.wrapS = THREE.RepeatWrapping
@@ -55,7 +55,7 @@ export class Vortex extends THREE.Group {
                     texture.repeat.set(2, 2)
                     this.colorFullCylinder.material.map = texture
                 })
-                this.colorFullCylinder.material.opacity = 0.8
+                this.colorFullCylinder.material.opacity = 0.6
 
                 this.globalRotation           = 0.028
                 this.darkTextureRotation      = 0.005