okay, i tried it on mouse and keyboard, and was able to do it. still wasn't fun but it was doable. you may want to look into using a controller, it was basically impossible.
level 5 is far too difficult. either the duck needs to be slowed down, or the allowed angle of looking at it increased. even if you had to look at the duck with the camera instead of the character it'd be better. as is i can't even get to the second platform, let alone the exit or the bug.