Last minor updates

Hi friends,
Babi worked to fix some issues that were still affecting some players.

• Fixed: Hidden people in the advanced mode not "being selected". If you click on the wizard student before she appears in the list of 4, she'll be selected and after that, you can't pick any more.
  
• Fixed: Hint on Christmas Bonus leads to a cat I already found.
  
• Improved: the cats' randomness to avoid cats that look almost "invisible".
  
• Improved: other little things that don't affect gameplay.
  
• Achievements Bugs:
  -- New players should expect no issues;
  -- Players who completed the levels or are in the middle of gameplay should re-enter the level. It's expected to receive the proper achievement, if don't, try restarting the level and replaying it. If you still got an issue, please talk to us.
  
  Other small updates might occur over the next week to polish a few things.
  
  Special thanks to all players that discussed those topics and pointed out the bugs and proposed solutions. You are awesome!
  
  Now Babi demands more sleep!