Use the arrow keys or spacebar to switch slides. A couple demos involve the mouse near the end of the tutorial. Fullscreen is recommended. Make sure you've read the first few parts of my last tutorial! I encourage you to recreate the code from these tutorials to help with understanding them.
Making understandable tutorials is tough. If there weren't websites like scratchblocks.github.io to help with displaying code, I'd probably just make the whole tutorial on paper or a whiteboard or something and take pictures instead. Then again, maybe I could try making a video... ',:D If you have questions or suggestions, let me know in the comments.
