Reddit, what are your top 5 Flash games of all time?

Whether it gets me class or a boring shift at work, Flash games are pretty essential to keeping me awake. How about you Reddit?

My list:

1. Desktop Tower Defense
2. Pandemic 2
3. Defend Your Castle
4. Third World Farmer
5. The Last Stand

Also, I immensely enjoyed some flash game a Redditor posted in a comments section a long time ago, but I forgot the name of it. Basically, it was a puzzle game about an old man and his wife. Links anyone?