Playing with Puffer fish is a fun simulation game developed by yamabus, available for Android 13.0 and completely free of charge. The game is simple and easy to play, with the objective of playing with a cute Puffer fish by putting your finger in the water. As you play, the Puffer fish's "Mood" increases, and it swells and bulges when it's low.

To improve the Puffer fish's mood, you can feed it by dragging tweezers and giving it food. However, if the mood is bad, the Puffer fish won't eat. Feeding the Puffer fish earns you points, which you can use to get a background image. The game also has a rush feature, where you can feed the Puffer fish at high speed.

One of the best features of the game is that the Puffer fish continues to grow even when you exit the application. This means you can enjoy playing with it anytime, anywhere. Overall, Playing with Puffer fish is a fun and addictive game that will keep you entertained for hours.