You are not completely wrong, but it certainly looks like the standard HTML canvas API as opposed to some API specific to codeguppy. The slides do not clarify

You are not completely wrong, but it certainly looks like the standard HTML canvas API as opposed to some API specific to codeguppy. The slides do not clarify this. The point at the beginning of the slide deck is to jump into writing the text immediately as opposed to "block" type languages like Scratch.