Great game you have here! Did you make the graphics in Flash / Animate CC? The graphics are adorable - love the derpy ducks. I like the music and SFX. The puzzles are intelligent and fun to engage with. I second the opinion of movement speed. Perhaps if you continue this game forward, you could give them a sprint option to solve that? I'd love to see some sweaty running ducks in this style of yours!
I noticed that with objects in the game, the sense of depth is kind of lost? Such as when pushing blocks down, the duck is on top of the crate -- which should be on top of the duck. This is actually super simple to solve in Construct. Make an Overlap family of these objects (ducks, turrets, crates, etc). Then on Every Tick go through the family in ascending Y coord. With the event of 'Move to top of layer'. :-)