diff --git a/js/detector.js b/js/detector.js
index fa795d3..91f5ff8 100644
--- a/js/detector.js
+++ b/js/detector.js
@@ -264,7 +264,7 @@ var detector =
 
     addEvent: function()
     {
-        var num = Math.ceil(20 * Math.random());
+        var num = Math.max(3, Math.ceil(15 * Math.random()));
 
         for (var i = 0; i < num; i++) {
             var index = Math.round(Math.random() * (detector.tracks.length - 1));
@@ -279,7 +279,7 @@ var detector =
             return;
         }
 
-        var num = Math.min(30 * achievements.count.workers / 10, 30);
+        var num = Math.min(20 * achievements.count.workers / 10, 20);
 
         for (var i = 0; i < num; i++) {
             var index = Math.round(Math.random() * (detector.tracks.length - 1));
diff --git a/js/event.js b/js/event.js
index 7c4abe4..3fef902 100644
--- a/js/event.js
+++ b/js/event.js
@@ -57,7 +57,7 @@ ParticleEvent.prototype.draw = function(duration, init)
     ctx.restore();
 
     if (!init) {
-        this.alpha -= 0.02 / 16 * duration;
+        this.alpha -= 0.03 / 16 * duration;
     }
 };