Mr Crab is a game centered around managing a fast food restaurant owned by a crab. The player's primary responsibility is to create and sell food items to hungry customers. This task involves crafting recipes from various ingredients, with the goal of making each item without mistakes.
A key mechanic in the game is time management. Orders must be fulfilled within a specific time frame to earn a good reputation and profit. The player must efficiently assign tasks to the restaurant's employees, balance orders, and avoid mistakes that can cost the business money.
The game runs in the browser without the need for downloads or registration. The player's ultimate objective is to efficiently manage the restaurant's performance, balancing the creation and sale of food items with the demands of the customers to achieve success.