Basic tutorial with flaws
The tutorial in this app contains quite a number of errors and typos. Most of them appear to be copy paste errors. Ideally a tutorial should have none of these, given that the goal is to learn other people something. As it is now, it can be quite confusing at times. Most of the examples are correct, but sometimes the shown syntax is incorrect, which might be confusing. Also, some essential information is missing. Like having a section on arrays, but nothing about slices. Or having no information on interfaces in the tutorial. My impression of it is that it is a bit sloppy and could be improved quite a bit with more time devoted to it.
