diff --git a/src/audio.js b/src/audio.js
index d0c5edc..3f2aed4 100644
--- a/src/audio.js
+++ b/src/audio.js
@@ -16,6 +16,7 @@ module.exports = function(gl) {
     audio.loop = true
     audio.addEventListener('canplay', function() {
       audio.play()
+      audio.currentTime = 40
     }, false)
   })
 
diff --git a/src/shader.js b/src/shader.js
index 8df695c..8765a3b 100644
--- a/src/shader.js
+++ b/src/shader.js
@@ -11,8 +11,12 @@ const glslify = require('glslify')
 module.exports = function(gl) {
   const vert = glslify('./shaders/point.vert')
   const frag = glslify('./shaders/point.frag')
-  console.log(vert)
-  console.log(gl.getParameter(gl.MAX_VERTEX_TEXTURE_IMAGE_UNITS))
+
+  var images = gl.getParameter(gl.MAX_VERTEX_TEXTURE_IMAGE_UNITS)
+  if (images <= 0) {
+    alert("Sorry, this demo isn't ready for your device yet!")
+    console.error("no vertex texture image units")
+  }
 
   const shader = createShader(gl, vert, frag)
 
diff --git a/src/shaders/point.vert b/src/shaders/point.vert
index 42d4bfe..bbea256 100644
--- a/src/shaders/point.vert
+++ b/src/shaders/point.vert
@@ -26,7 +26,7 @@ void main() {
   amplitude = ease(amplitude);
 
   vec4 npos = vec4(vpos, sin(iGlobalTime * sin(2.85 * mult.x)));
-  npos.x += amplitude*0.1;
+  npos.x += amplitude*0.3;
 
   float fade = 1.0;
 
@@ -46,6 +46,6 @@ void main() {
   uv = sUv;
   uv.y = 1.0 - sUv.y;
 
-  gl_PointSize = dist * POINT_SIZE + amplitude*0.1;
+  gl_PointSize = dist * POINT_SIZE + amplitude*0.05;
   // uv *= 1.5;
 }
\ No newline at end of file