A couple adjustments.

src/Goldfish.java

@@ -7,8 +7,8 @@ public class Goldfish {
     private Render _render;
 
     public Goldfish() {
-    	int height = 96;
-    	int width = 96;
+    	int height = 128;
+    	int width = 128;
         _grid = new Grid(width, height);
         _render = new Render(width, height, _grid);
     }

src/Render.java

@@ -43,12 +43,12 @@ public class Render extends Canvas implements Runnable {
 	}
 
 	public Render() {
-		this(256, 256, new Grid(128, 128));
+		this(256, 256);
 	}
 
 	private void setScale() {
 		if (height <= 128 || width <= 128) {
-			Render.scale = 3;
+			Render.scale = 4;
 		} else if (height <= 256 || width <= 256) {
 			Render.scale = 2;
 		}