Players navigate through various environments in Fatty Ken 2 as the main character, Ken. His goal is to move from the top of the screen to the bottom. The game features colorful levels and obstacles to overcome.
The player's progress is determined by Ken's distance covered on the screen. The game's outcome is based solely on this distance, with higher scores achieved by reaching lower positions on the screen. Players can run through the levels without registration or downloading, and play directly in their web browser.