Another bug: I finally reached the boss, I thought I was doing quite well, until I reached a point where you had to jump. No matter whether I held down, tapped, or even rapidly pressed the up key, nothing happened. :(
It's an amazing game, but I have read there are lots of bugs. I have also found a strange bug. The bars that what I think indicate what level you are when grabbing your duck, my one for Flying is a glitch amount and the bar is long enough to go off the shaded black part it's on.