Null Matter is a relaxing puzzle game developed by Qookie Games for Android devices. The game's objective is to clear all particles from the scene by merging and discovering different types of matter and antimatter particles to eliminate them all. The game includes 50 levels to complete and one infinite game mode, making it a challenging and engaging experience for players.

One of the best features of Null Matter is its dark and bright theme that can be inverted, making it easy to play in any lighting condition. Additionally, the game has simple and easy controls that allow players to focus on the puzzle-solving aspect of the game. Players can also discover and use multiple types of elements to change the properties of the particles, adding an extra layer of complexity to the game.

Overall, Null Matter is a great puzzle game that provides hours of entertainment. It does not require an internet connection to work and does not require any special permissions, making it an excellent choice for anyone looking for a fun and challenging puzzle game on their Android device.