A nice looking game. I quickly got into a pattern where I just kept the mouse in the same x position, because the chicken stays in the middle of the screen. So I wonder if it could be more challenging to have a bunch of rooms where the camera stays still, and when the chicken gets to the other side of the road (I mean screen), it goes to the next level. Just to force the player to move on the x axis as well.
I also couldn't get it to bounce very well. It felt like I needed to catch the chicken, and then move the spring down and up again to make it bounce. Presumably one of the bugs you mentioned?