Totally fair.
Yes, we tried to keep a balance between not outright giving the answers but also not keeping it so vague that it no one can finish it. Clearly the balance is off but it's something that we'll keep in mind in the future! Thank you so much for your feedback.
Oh and BTW, you can speed up text, it reacts to the spacebar, the ENTER and Z keys on the keyboard! And yes, what you bring up is totally not intended, the nodes should indeed be updated on visit.