Its dooms lesser brother
Ok I ain't gonna say anything more than it's basicly doom without the card puzzle door things. The enemies as said before need to vary and auto-heal makes us robo-cop. Ditch the auto-heal, make the guns have pros and cons (hand gun: unlimited ammo but sucks, machine gun is rapid fire but limtied bullets, shotgun very powerful but only at short range etc.). You have something really rare here, a 3D flash is very very rare (is not non-existent until now) so make full use of this and by the way: ditch the name for the game and just call it Last hope or something, zorro makes me think of the ever legendary swordsmen!