Very nice! I've only noticed a couple of issues- The spikes' hitboxes seem to be a tiny bit bigger than the sprites, which can be frustrating at times. I also managed to get myself stuck on the ledge near the start somehow, and had to restart. Though fortunately, that's very early into the game and I didn't lose much progress
Aside from that, I loved it- The interactions between the duck and the narrator are quite funny, and the gameplay was satisfying. Also, I appreciate that the quack button is "Q."