Capcom's answer to every SNK shooter
The game is basically every over the top perspective 2D shooter (Raideen, 1942, etc.), but with some familiar (and new) Capcom favorites. Instead the game takes advantage of the 3D perspective and adds a bit more fun to it. The game moves quick as bullets fly at you from nearly every corner, but like in many games of this nature you have your normal shooting attack and a special attack. Though once more the perspective allows you to move around smoothly (though at times not quickly enough) as you go through it and face many familiar Capcom characters.
It's fun if you're into these sort of games, but like many of those games, it just ends a bit too quickly and the difficulty (even on the lowest setting) is rather challenging. Luckily you get characters from Megaman to BB Hood to use and adds a bit of replay.
If you want a good shooter game, hell Cannon Spike is a damn good choice.