This game has unused graphics.
Magic Cube is a somewhat Columns-like game.
A logo for Kukje Academy, likely meant for a Korea-specific version, is still present within the game code and data. However, it needs more than a couple of Game Genie codes to make it appear. You can re-enable it with the following hex patch applied to the ROM in ines format:
000501: 00 80 000826: A0 02 20 80 8C 000832: 03 000962: A4