An interesting take on the formula from the second game, yet a bit lackluster in the long run.

Compared to the second game this game takes a formula of some kind of versus battle where your character is on the left with the opposing character on the right and you fight each other trying to fill each other's screen with the most amount of bullets possible. Whoever loses all their HP first, makes the other character win. It's an interesting idea but that's all there really is to it. Not to mention that the game is quite easy since you regain all your HP and bombs after you finish the level and in general the game is just far more forgiving. You can also play this game in multiplayer and that'd probably be pretty fun.
This game also focuses much more on the story, so to speak. There's a lot more dialogue this time around and the endings are actually quite different now since there are also multiplae characters you can play as, all having different speed and projectiles. The music is fine and the visuals aren't bad but they're not as good as second or even first game.

Overall, I still think this is a bit better than the first game but quite a bit worse than the second.