Gravity Balls 

Oftentimes, the simplest games are the most fun. When a formula doesn’t have much nuance or complexity, it can engage the player without being prohibitively hard to learn.
Enter Gravity Balls. There’s nothing brilliant about the design; in fact, the idea is simple enough that anyone could code it. But it’s so goddamn infuriating, and I can’t stop playing it. » Read more about Gravity Balls