Very repetitive, boring and not worth playing at all.
To put it simply, in every level you run around isometric dungeons fighting identical monsters. And collect some items. That really is all you do. Just clicking the A button. You carry on playing, thinking there will be more to it, but that really is all the game is about. I don't even bother killing anything, because as soon as you exit a room, all of the monsters come back anyway. You through level, uh, doing "epic fighting"(note the "s) and when you've finished, guess what, more dungeons, and more, harder monsters! Yay! Or you might go to a spaceship level, where you get to tap the spaceships. Fun.
No, really, there is nothing special about this game. If you enjoyed it, you really need to try some decent DS games, and this is not one of them.