This game was originally announced as a downloadable game but it seems with the recent E3, the game has become a retail one. No one at E3 has talked about this, so I remain a little confused.

The live demo was awesome so I hope it's a huge retail game.

It probably started as downloadable only but then figured they had enough solid content to push it into a retail release?

Oh my god that's incredible.
 
This is the best thing to ever happen.

That's cool I guess, it looks great so I want it either way.

An interview I watched said it is about 20 hours long. Surprisingly, it looks really good.

They revealed it in Game Informer a couple weeks ago. Yes, it's retail.

If it means 1000 points for playing an awesome game instead of just 200 points for playing an awesome game, this is fine by me!

Yeah I don't know if I can personally justify spending 60 bucks on it. Whereas 15 would have been a day one purchase. 
 
Saying that it looks amazing and if I were more than a casual fan of 2D platforming (much prefer 3D myself) I would definitely be more excited for this. 
 
Donkey Kong and Kirby both worked as full retail releases so this should too. 

20 hours long?! Thats fucking awesome! I'm not sure I want so pay $60, but if they have that much content I can't wait!

I didn't want to make another thread, so does anyone know if this is a 3DS game as well as a DS game?