Cheat code screen: Press Left + Y at the Soul Fighter logo. Enter the options menu, then exit. If done correctly, the next screen that appears will be the cheat code screen.
High energy: Enter ABXXYA as a code at the cheat code screen.
All weapons: Enter XAAYBB as a code at the cheat code screen.
Level Select At the cheat code screen, enter the following codes to get to the corresponding levels.