Sorry to hear you had that happen. Level 13 is supposed to be a "secret" level which is why you can't restart the game from there. Spoiler alert following (click and drag to read)--
There's only that one board in Level 13 and that's the end of the game. Pressing the S key turns the star scrolling off if that's a distraction.
The last board on Level 12 was the one that was the hardest for me...it's just a matter of getting enough matches in the innermost loop to hold off the chain long enough for the meter to fill up, then hope that you can clear out the leftover marbles before they hit the drain on the outer loop. What you can do when you restart is to begin from an earlier level than 12 to build up your lives. Good luck!