Players take on the role of a researcher who has stumbled upon an alien artifact that gives them the power to become an alien. The game is set in a futuristic laboratory where the player must grow and care for their alien plant-like companion, Dr. Green.
The core gameplay involves managing the alien's growth and resources, which affects its abilities and behaviors. The main objective is to keep the alien healthy and happy, which requires balancing factors such as nutrition, environment, and interactions. The game runs in a web-based environment, allowing players to access it without needing to download or register anything. By succeeding in caring for the alien, players can unlock new features and abilities, progressing the game and increasing their challenge.