This game begun easy with nukes coming all the time. After a while it started lagging pretty damn much and playing this in slow motion is even easier. Give this some work, add more features, more difficulty, and make it stop lagging and this will be a very good game!
The mute button muted my last.fm radio, i assume this is because you used stopallsounds? instead of stoppping each sound properly.
The difficulty does not increase with the size, the wrong ways is not very long so it is very easy to spot the correct way.