Always when I finish the 1st level, the ship explodes with a big bang But then, the levels goes on, as if I wouldn't have achieved it - although there doesn't appear stones anymore. This is quite annoying, because I would like to go on with the next level
I have tried it using Firefox and Google Chrome, both are up to date.

I would like to know if others have this problem too, or if I do something wrong when I destroy the ship!

There is a bug that can sometimes cause this. It was not apparent before, so maybe it only happens in faster browsers. Sometimes the enemy ships disappears out of the screen and therefore cannot be destroyed. It does not happen always. I'll try to fix it.

I've tried it with Firefox, Google Chrome and Opera. I also installed Firefox v.17 (current version is 26) to test it, but none of them worked. I also tried to play it with Internet Explorer 10, but there the game didn't even appeared, it just kept black!

This is very (ultimate) slow for [x32] processers.

Any key in the keyboard is the music corrupter; when I press a key the music is corrupted but normal when I don't press anything. So I have typed this comment and the music corrupted when I was typing.