Numbrus is a free Android puzzle game developed by Axel Sonic that will keep you hooked for hours. The game is easy to understand and play. The objective is to merge balls with the same number to create a higher number. The bigger the number, the bigger the ball.

The game becomes more challenging as the play field fills up, so you need to think carefully about every move you make. The game ends when a ball with a different number touches another ball. With each move, your score increases, so try to make as many moves as possible to get a high score. Numbrus has 40 challenges that you can complete to test your puzzle-solving skills.

Overall, Numbrus is a highly addictive puzzle game with a simple yet challenging gameplay that will keep you entertained for hours.