This game is great. Just completed the first zone.
It's a real return to classic 2D platforming. If you love platformers like me, you won't be disappointed! Sure, there are a few Wii gimmicks thrown in here and there such as rotating the wiimote to adjust your aim and shaking it to expel coins from bags but the gimmick isn't heavily used and the game is mostly just classic 2D platforming. The boss fights are awesome too.
Graphically the game is very nice, it's not true widescreen though - there are item bars on wide screen displays, but it's not very distracting. The hand drawn animation is very nice and the game plays very smoothly at 60fps I think.
Being a platformer, the game isn't very heavy on Japanese text except a few cutscenes and an item shop, and seems like it should be easy enough for non Japanese readers.