Sorry to take so long to reply. The only thing that really confused me was the stages that I couldn't change the shot direction. I ended up noticing that it was intentional, but with so many in a row early on I had thought it was a bug for a bit.
Ah I see. Well, doing a tutorial is already hard. Making a _good_ tutorial is even harder. Also, it takes so much effort and code changes, that sometimes I felt, coding the tutorial itself is like coding a new game. Thanks for your feedback!!