Maximum Health: During gameplay pause the game and on your controller press A, B, Right, A, C, A, Down, A, B, Right, A.
Unlock Level Warp: At the 'SEGA' screen shoot the SEGA logo 24 times then jump and hit the sega logo with Vectorman's head 12 times and the SEGA letters will start falling. If you catch 90 to 110 letters you will start on Stage 5, you need to catch over 110 letters to start on Day 10.
Unlock Taxi Mode: During gameplay pause the game and press C, A, Left, Left, A, C, A, B (Call a Cab) to transform to a small cursor which allows you to travel anywhere in the level and can kill enemies (not Bosses). Pause gameplay and re-enter the code to disable the cheat effect.