The game itself is fun, but it often doesn't save my progress and messes up my score. It's one of those "3-hour-task" games where you have to do part of the tast then wait for more energy, but most of the time it doesn't save my progress so it's impossible to get full stars. Even if I finish a task, if I close the app and come back later, it will set me back to before the last task and say I didn't finish in time.