Thank you, I appreciate the kind words and the feedback!
It's very helpful to hear your experience with it; these are all concerns I had while making it and figured they would need tweaking for future versions. In general, I definitely plan to implement tutorial sections and ramp it up in a full game. They player is certainly tossed into the deep end right now!
While deciding on the tempo of the bird songs for the jam, I wanted to make them faster in order to sound more like actual bird calls and therefore help add to the atmosphere. But, in the interest of not going completely fashion over function, I put the songs at different octaves as well to hopefully help make the tune more easy to grab on to (though, I realize that this could also make it sound like there are more melodies than there actually are). I will experiment and try to make them fast enough to sound like birds but slow enough to be practical!
For the timing of how often the birds sing, my goal was to not have the player need to wait too long to hear the tune again, especially since you don't have all day (literally) to learn it. But hearing that you felt it was too fast, I'm definitely going to look at extending the wait times!
I'd love to know if you're a musician or are a very active music listener? I showed this game to some people who have a developed musical ear (but don't read notation) and they seemed to be able to hear and replicate the appropriate pitches (not without some difficulty). I feel that it's very tough right now even if you have a developed ear, so I'm trying to figure out what people's experience with this game are like in relation to their experience with music.
Thank you again for the in-depth feedback!