Yay, I got the game. Booh, my kids hijacked it straight away. Oh well, seeing the huge smile on my 4 year old's face was totally worth it, and by the time I get my hands on it everything will be unlocked.
So far I'm quite impressed. No matter how much crap they throw on screen it all just works. Stacks and stacks of marching enemies, walls of mushrooms, coins flying everywhere lol. They're not getting very far with the actual tutorial :)