Happy Pin is a free Android game developed by S.Knife Pro that is designed to test your reflexes. The objective of the game is to throw all the pins at the right time and let them insert into the rotating object without hitting other pins. You can unlock more pins in the game by collecting balloons.

As you progress through each level, the game gets harder, and after the fourth stage of each section, you'll encounter a challenging BOSS level. Happy Pin has a great physics engine that makes it even more fun to play. The game's playability is excellent, and it is a fun and relaxing game that helps you focus.

The game offers a lot of styles and kinds of pins, and you can upgrade your pins by collecting more balloons. Happy Pin is an exciting game that challenges you to throw pins, smash targets, and try hard throws. Gradually increasing the difficulty of the game makes it a perfect challenge for players who are looking for a fun and challenging game to test their reflexes.