I've only just started going through some. After a long week trying to make a game I decided on having a quiet day of not thinking too much. I will be back later in the week with an opinion when I've played more games.
So far I've only played about 20 games, but the one that has stood out the most to me so far is Infested. While not directly following the theme it has an interesting story and twist that made it enjoyable to play.
Another one for the list that has an interesting set of mechanics is "Cabin Fever".
There's only 1 level and the graphics are not really refined, but the primary mechanic to heal your patient is well thought out and works differently to how you might expect.