How to unlock Sekisyusai and the two bonus modes
Well to unlock the password menu you must be in this menu
You will have the memory with any program, and you go to the address 0x2C150DA9 (real address 0x8C150DA9), and you change the value 00 to 01 (This to launch the game as GDROM or CDI)
Once done, the game will automatically go to the password menu
Although the word pasword is dark, it is selectable, enter and the menu to insert codes appears
Now the Codes
CCCCCCCCCCCC to time atack mode
EEEEEEEEEEEE to survival mode
GGGGGGGGGGGG to Sekisyusai
Only the two secret stages and ZINE remain to be unlocked