Looks like a smartphone game.
@TokioBoy Also, Japan is in fact smartphone country, smartphones have already replaced a lot of the handheld sales in Japan and while there's still good handheld games being sold, I can find a little over 5000 similar games on smartphones. They are probably all as challenging and probably offer just as much content. Neither of those are reasons for a game to be good or a reason to be not called a smartphone game, besides, I never said smartphone games can't be fun to play. Or Flash games for that matter, I love The Binding of Isaac.
@UltimatePisman totally stupid comment. it's number 1 in the eShop in Japan, a really challenging action game with hell lot of content.
you have no idea. Is Mario a smartphone game? Play it first