Cheat mode
At the "Press Start" screen, press B, A, R(2), A, C-Right, Up, Down, A. If you entered the code correctly, you will hear a sound. Select the "Replay Mission" option at the main menu, then press L to display all missions and R to select your team. During a mission, press L + R to display programming debug information. Press L + R + Up to automatically win or L + R + Down to automatically lose.

Adjust battle screen
At the battle screen, hold L and press C-Up or C-Down to magnify and reduce the screen.

Easier building
Highlight a unit that will be created from the toolbar, then press A. Hold Z and press A after receiving the "Unit Ready" or "Construction Complete" message to build the same unit again without returning to the toolbar.