Draw your own mazes! It helps to use Turbo Mode (shift-click the Green Flag) To draw walls, hold down the mouse button and move over the wall sections. To erase walls, hold down the space bar and move over the wall sections. To save your maze as an image file in your Scratch programs, you need to capture a screenshot. Learn how from here: http://scratch.mit.edu/projects/25163264/
Learn to program games with this free online Scratch course: https://inventwithscratch.com/class