Simple game, a person makes a wish. Anyone else can “corrupt” it. Then that person makes a wish of their own, and the cycle continues.
For example:
Person A: I wish I had 1 million dollars.
Person B: Wish granted, but they are Monopoly dollars. My wish: I wish I could fly.
Person C: Wish granted, but sustaining flight requires 500 calories per minute. My wish: I wish I could teleport.
etc.
The food is absolute nauseating in taste, despite being extremely good for people health.
I wish for an efficient way to create fusion energy to be discovered.
Wish granted. This causes weapons of mass destruction that rely on fusion tech to be much easier to acquire, plunging the world into a new cold war.
I wish I could shape-shift into any animal at will.