I got it and I like it quite a bit. It's different but apparently it's 60 levels and I got through 50 in maybe an hour so you're not getting a great value. It's also a bit bare bones -- you launch after the first boot-up and the game just plops you into the puzzle you were on. Maybe after you beat it you get a menu or something, but as I see it now it's a bit stripped down.
With all that said the game concept is neat and you're not going to find that in any other game. Check out the trailer in the eShop. I think it's neat and everyone with any interest in puzzle games should try it. But if you're on a tight budget I can see not dropping $7 on this.
Watched the trailer, it looks pretty neat but I think I'll wait for a price drop.