Click on the character and try to move through the maze with out hitting any of the grass or the trees.
Watch this video at CS First to learn how to build it: https://csfirst.withgoogle.com/c/cs-first/en/game-design/maze-game/remix-the-maze-starter-project.html If you're a teacher: Lesson plans are also available on the CS First site. If you decide to sign up for a CS First account, you'll be able to track your students' progress, order physical materials (kits), and access your students' projects in Scratch.
