It's a really enjoyable game. I especially like these "swappers", they really make a difference in the gameplay. I can recommend this one to anyone who likes challenges.
I don't know but I enjoy this game. You have to play a little more and it will reveal it's interresting features. I really like the Quick Challenges and although not every Power Up is the best in usability it has several really good ones. Using disasters to aid yourself is a good idea if you ask me :) I suggest to play it more not only 10-20 minutes and you may like it.