We had problem with saved data each time when we have uploaded new game version. Now it works fine. But unfortunately you need to start new game. Sorry for that!
There should be "Instant Death" blocks, and blocks that grow the ice cube. Or dripping water that grows it. Also, as you've probably already heard, it needs more levels ;). And possibly highscores for shortest times, and largest cubes.
We had problem with saved data each time when we have uploaded new game version. Now it works fine. But unfortunately you need to start new game. Sorry for that!