Um, shouldn't you be calling ptitSeb for help rather than me, though it seems he appeared anyway. (yeah okay, maybe you weren't calling me for help)
Too bad about the loss of the score though.
No idea what happens after completing the game, I've not gotten that far yet though I'll definitely give it another try in the next few days.
And while I'm posting here I should probably report that the game seems to be saving high scores to the home folder (~/.clanlib/methane/1.5/highscores) rather than to the appdata folder.