Cheat codes:
Ingame press F2 and click on 'ships' then click on the name of the ship, completely erase it, and then type:

To activate/deactivate a mode of complete invulnerability (both on a land and on the sea) : 
GodMode

To receive 10000 experience points:   
ExpBooster

To receive 10000 in gold:
MoneyBooster

To receive the best sword (In order to equip it, you must have the level required for that sword):
BestSaber

To receive the best pistol (In order to equip it, you must have the level required for that pistol):
BestGun