Really fun and addictive game. Btw I maxed out the advanced level-up skill (for now, 6 levels). That would, statistically speaking, yield at least one advanced skill 3 out of 4 times when leveling up. I actually had such a rate before, when t was level 5. Not any longer, though, not even close. Is it a bug, extreme misfortune, or does low security/integrity affect this upgrade in ways it doesn't others?