Bubble Sort 2021 is an addictive puzzle game developed by Brain Fun Games for Android devices. The game challenges players to exercise their brains and test their limits by sorting bubbles of the same color.

In Bubble Sort 2021, players must tap the tube to move the bubbles. The objective is to put together bubbles of the same color. Only bubbles of the same color can be grouped together, adding an extra layer of challenge to the game.

If a level proves to be too difficult, players have the option to add a tube to make it easier. This allows players to tailor the difficulty level to their preference and skill level.

One of the great features of Bubble Sort 2021 is the ability to restart a level at any time. This allows players to retry a level if they make a mistake or want to improve their score. Additionally, the game offers a back button that allows players to go back step by step, providing a strategic element to the gameplay.

Overall, Bubble Sort 2021 is a captivating puzzle game that exercises the brain and offers a challenging gameplay experience. With its intuitive controls and various difficulty levels, it is sure to keep players engaged and entertained for hours on end.