Thundercade

Not to be confused with the ThunderCats, which are totally different.

Test Menu
Enter the Game Genie code to enable the test menu cheat. Wait until the 4th demo sequence is over, then wait for the title screen to appear on the screen. Afterward, when "PUSH START BUTTON" appears on the screen, press and hold the A button on the first controller.

You can play any music or sounds from the game, select any level to start and enable invulnerability. The option for displaying messages does not work. You can select menu options by pressing Up / Down, and press Start to use the highlighted option.