An Glow Ball 2D is a type of video game where the player controls a character who runs endlessly towards the right of the screen while avoiding obstacles along the way. The objective of the game is to run as far as possible without getting hit by obstacles, which could include gaps in the running path, incoming obstacles like blocks, spikes, enemies, etc. The game is usually set in a fast-paced, side-scrolling environment and often features randomly generated levels to ensure that each playthrough is unique. The difficulty of the game increases as the player progresses further.