diff --git a/autqzs1rvq.js b/autqzs1rvq.js
index c2a9fb2..eb5f328 100644
--- a/autqzs1rvq.js
+++ b/autqzs1rvq.js
@@ -96,18 +96,12 @@
 				
 				var amount = 1 / this.level;
 				
-				if (amount < 0.2) {
-					amount = 0.2;
+				if (amount < 0.05) {
+					amount = 0.05;
 				}
 				
                 this.spawnInterval -= amount;
 				
-				if ((this.spawnInterval - amount) < 1) {
-					this.spawnInterval -= 1 / this.level;
-				} else {
-					this.spawnInterval -= amount;
-				}
-				
 				console.log('level : ' + this.level +', spawn interval : ' + this.spawnInterval);
 				
 				GameLib.Event.Emit(
@@ -550,14 +544,6 @@
         }
 
         if (!this.fuelFinished) {
-            /**
-             * Light up the scene
-             */
-            //this.fog.color.r += 0.01;
-            //if (this.fog.color.r > 0.5) {
-            //	this.fog.color.r = 0.5;
-            //}
-            //this.fog.updateInstance('color');
 
             this.renderer.clearColor.r += 0.01;
             if (this.renderer.clearColor.r > 0.45) {