Layout Laments - Shrink Margin Of ImageButton?

I have my layout (semi) done, and was wondering if I am doing it in the most efficient manner possible. The layout seems very nested, and I am getting warnings about nested weights but do not know how else to proceed.

I am including my layout file, as well as what I want it to look like, the play field is all that is left.

**Small note, is there a way to shrink the margin of a ImageButton? the large ugly grey lines around the players hand is kinda unsightly.

Code:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"[code].....