This game has a hidden level select.
Merge the DecapAttack and Magical Hat articles and add regional differences.
A reskinned version of Magical Hat no Buttobi Turbo! Daibouken for the west.
In Options, move the cursor to Exit. Next, press Right, Left, Left, Right, Right, Right, Left, Left, A. The Round Select text appears. Toggle it ON, and when you begin a game, the Round Select menu appears:
Memory address $FFC374 is set to 0002 when the code is successfully entered, and memory address $FFC376 is set to 0001 when the round select is toggled on. The 9-button-press pattern begins at address $033AD2.