Holy crap. I checked out a bunch of games for this jam and this is my favorite. The music is sooo good (is that a real guitar?) but I wished there were more sound effects.
First stage:
So great! Controls were nice and snappy, I liked how you can't go left and up at the same time! And the stream looks so cool. Such a nice gameplay mechanic.
Second stage:
Amazing (I liked first stage a little more though xD)! I liked how the music changed pitch, though it reset every time I died, became a little repetitive. Maybe a little challenging but I found it fun (Reminds me of getting over it)! The log was a pain to get past though lol.
PS: The sprites didn't really match the feel of the first level, maybe make it more blocky?
Third stage:
Nicely done boss battle. The AI was pretty good, but at times the bird was just spazzing out. Maybe it had epilepsy? Anyways, liked the second phase of it, the little bird darts are a nice touch!
All in all, really well made game. Only 72 hours? You are great man. With a little more polishing and changing of the sprites, you could make a great game!
Again, the music was out of this world, but maybe you could ask your artist, (or yourself) if he/she could make a different sound track for the boss battle.
Anyway, 4.9 out of 5 stars!