Or... is that the game, I should be able to ID the notes irrespective of octave?
For example, if the solution was:
Bb3 Bb4 Dd5 Db5 C5 Bb4 (the first 6 notes of a "Believer" melody)
... the piano octaves will be [3,4,5,5,4]
In today's puzzle, the first note is in octave 4, and the second note is somewhere in octave 3.
In a VERY early version of the game, we didn't show where the octave positioning was, only 7 white keys, and people got confused because even when they accurately thought that the next note was higher based on the interval, it actually ended up being a "lower" note because it was a lower note on a higher octave scale.
So now we give you the octave positioning.
Thanks for mentioning it! I really struggled with this octaves decision, and wrote about it here: https://news.ycombinator.com/item?id=38410228
However, starting to also think that maybe I should just write a note on the page explaining what it's doing, lol.