Pixel Up: Fill up the Box is a free puzzle game developed by Pixel Bisrto for Android devices. It is an amazing brain game that challenges you to fill the blank area in the block with pixels of the same shape. The game is easy to play and requires you to touch the screen to make the block jump. As you progress through the game, the pixels become more complex, making it challenging and engaging.

The game features two gameplay modes: Endless and 300 Stages. In Endless mode, you can play the game as long as you want, and in 300 Stages mode, you can play 300 different levels of increasing difficulty. The game also features 12 leaderboards, allowing you to compete with your friends and challenge them to beat your high score. Additionally, the game includes fun items that add an extra layer of challenge to the gameplay.

Overall, Pixel Up: Fill up the Box is a great puzzle game that is perfect for anyone who loves brain teasers and challenges. It is easy to play, yet challenging enough to keep you engaged for hours. So, if you are looking for a fun and challenging puzzle game, Pixel Up: Fill up the Box is definitely worth checking out.