The intro shows Calista's Stats...
Before a boss battle, you get to see the boss' fighting style, it's attacks, and it's weakpoints.
Dracaena; the first boss and two-headed Mecha Godzilla ripoff!
After successfully beating a boss, you are then taken to the Item Shop to buy items that can restore and extend your health bar, lock-on bar and shield bar!
A little tidbit from the story.
Like any arcade game, you are given the option to continue or quit. In this game, you are given only 5 continues; after that it's Game Over.