I would start this lesson by having them complete bubble 2 which prompts them to make a list of information about the program before handing them the completed Project Guide to compare their answers with.
Discuss: Students should have individually created a list of variables, sprites, and functions they would create to make the defender game they played. Ask students to share their lists with a neighbor before discussing as a class.
Project Guide: The project guide is intentially filled out for students so that they can experience using it as a reference when programming. This should give them more context when filling out their own project guide in the next two lessons.
You can give each student their own copy for reference, but you might also choose to print one copy per pair, share digital copies, or just display the guide on the projector. So long as it is available for reference, any approach will work fine.
Distribute: Give each student or pair of students a copy of the Defender Game - Project Guide
Prompt: Compare the components of the game you thought would be included to the ones on this project guide. Do you notice any differences?