My Take
There are many things I like about this resource. First, how you can play and pause to see how your code functions. I think the interactive-ness of this resource is great since you can edit the pencil code, press play and get visual feedback on whether you coded correctly or not. With this, it is very easy to see where you might have gone wrong in the code which can help students understand basic coding logic at the start.
I didn't like the User Interface between all the different functions. I totally understand there are a lot of functions and dividing the functions into 8 blocks which dropdown for more is likely the best approach, however, I believe this could be very overwhelming for beginner students. This would be especially overwhelming if students have no coding background as some of these tools are very large and have lots of text. An example of this is in the Snippets section, the "forever #, -> fd #, if not inside [window], stop() +" function would be extremely confusing for people knew to coding.
How I Use It
I would use this as an introductory tool for very basic coding logic. The tools such as for, while, and if are all common parts of basic coding, and I believe by being able to visually see what your code does, it helps students.