First, nice game.

Second, as it has been said, it slows down. First test is fine, then it starts glitching, at first only noticeable via back animation. After the first test, it's noticeable. After the second, getting worse. I can't finish the third, it's so slow UI registers touches in the next game.

However, there is no need to remove battery. First, with patience the game exits, even if each menu takes 30 seconds. Secondly, leave it be and it gets killed after a few minutes (or crashes).

Also, a feature like best score per game would rule. Also, best score ever could also be cool. Finally, what score should I get in baloons? I pop quite a bit and get failed. I only got it once and with score in the hundred thousand I got a C- or so. What am I missing? Is it luck, too? I have A* in all other games minus the sheep (it's unplayable by the time I get to it)

Also, excluse typos, N900.