This tutorial describes how to use the Kodu Game Lab game builder to create SD worlds and computer games of various genres - from simple "walkers" to "shooters" and puzzles. The book is divided into topics, having mastered which on the examples of small demo games, you can create your own full-fledged game projects. The step-by-step training methodology used in the manual will help you develop your algorithmic thinking, as well as programming and development skills.