It's extremely goofy. The gameplay's simple and fun and the music's nice, but you absolutely have to unplug your brain playing this. The two main characters kill thousands of enemies without a sweat but absolutely refuse harming the main villain-- even after he kills his own father and attempts to murder their mother-- and everyone in the cast goes "Yeah, friendship guys! We will save your homicidal friend!" while standing on the corpse of countless soldiers probably forced into a war against their will.
Oh, and you know what? The protags hesitate for so long it just drags the war even further ahead-- every passing second there's probably a hundred soldiers dying in this game.
Don't overthink it like me-- or, point and laugh with a friend. It's fun.