Great game
You stole the sprites and backrounds from metal slug! Shame on you. No but really if your going to use metal slug sprites how come you're using one of the enemies as the protaganist? I say use Marco or Tarma as selectable characters. Eri and Fio too. And maybe Uzi the laser equipped chimp! And maybe as a boss you can use Gen. Morden's zombie form or Super soldier's zombie form. Overall a great game.