Missile Trick- Select the Arrows and Bombs in the sub-screen, once out 
                  of the sub-screen press A and B at the same time.

Screen Warp- Right before you move into the next screen press Select
                  to see the map. Next exit the map screen.

Different music- At the select file screen. start a new file and
                  type in ZELDA. It must be in all upper case letters 
                  to work