Using the touch screen tapping the bottom right corner of the screen to change from the bullets that your already shooting to be bombs, and the middle right part of the screen would be to change to missles. the top right part of the screen would turn on and off the shield.
Using the touch screen tapping the bottom right corner of the screen to change from the bullets that your already shooting to be bombs, and the middle right part of the screen would be to change to missles. the top right part of the screen would turn on and off the shield.