Just wondered if anyone played this? It is from the makers of Clash of Clans, it's fast paced and gameplay is a lot shorter than Clash of Clans so it is easier to fit into the odd 5 minute break you may have in your day. I really enjoy it, you can play solo but it's better as part of a clan as you can donate each other cards to help you level up and now they have a new clan wars where you can play as a clan against others.
I'm in a semi-active clan so if anyone would like to join then let me know. I have maxed card levels in my main deck so can help you out by donating anything you need.