I upload the fix if someone is interested.
Playing without shadows is not that bad, actually finish the game wihtout them.not that bad tbh. The main issues with this game is Shadows, there are 2D.i try to do something with shadows in this game, but there're treated like 2D object, so i don't know if is possible to fix. You have first person shooter, bosses, duels.
The game is fun, not a piece of art, but fun enough to shoot some bad guys and finish the game.