It's a point-and-click. No keyboard is required. Mk stands for "Mark", or "Level".
Scratch the Cat has a new job! Help him make candy so he can help the company become the best candy factory in the world. Buy 3 different kinds of Candy Machines and level them up to make more candy. Hey, wait? What are you doing here? A new factory was built! Check it out here: http://scratch.mit.edu/projects/41014274/
