I noticed after level 5 that you can get more skill points if you get a better score, so I went back and played a few, but then I played one I didn't mean to click on. Since there wasn't a "menu" option or a way to quit it, I figured I'd just let the guys come and lose. I got the "mission failed" screen and when I click "done" the panel comes across, but not completely and then opens back up to the same "mission failed" screen.
the last level shook and then a blank screen. Now what? Also...when I chose to continue my game, I noticed that 10, 15, 20 were still locked. Do I have to get a certain score to unlock them?