i like the model of the duck very nice ( :
as for gameplay i think it's at a good point... i would either lessen the sprint speed or make the higher levels a bit more difficult ? the knockback from the cannons should be a bit stronger as i dont think i could have been knocked off by a hit. other than that the sound is a bit loud at the start but the volume controls worked so not really too big an issue, maybe start it out a bit lower is all.
pretty solid gameplay though doesnt seem buggy ... had a small issue getting to know when the sprint is able to be activated ( i think it only activates if you have both feet on ground before a jump?) thats about all the nit-picks i have cause again it was a solid run through .
full run for me was 1:48 from menu screen -> play through of Quack to Basics by Muulk (gyazo.com)