Double sniper rifle damage (AI seems unaware of second shot, when playing). Spread out flakes along X when looping and add a little Y variation. This avoids noticeable patterns. Especially on the rarer close layer or dense flakes like rain (for Y)
<?xml version="1.0" encoding="utf-8"?>
<merge xmlns:android="http://schemas.android.com/apk/res/android">
<ImageButton
android:id="@+id/btnBack"
android:layout_width="120dip"
android:layout_height="40dip"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:adjustViewBounds="true"
android:scaleType="centerInside"
android:background="@android:color/transparent"
android:src="@drawable/backbutton"/>
</merge>