You can play your game on any device, you will just need to login. The game uses a login code system to log you into your devices. There is no limit to how many devices you can play on. The device continue to will remember and automatically load the last game that was played on it.

You will need to get your account login passcode, then login to your existing game with it on the other device. You can see step-by-step instructions here on How To Load an Existing Game.