What an awesome game concept!! I love the freeform drawing (which my team's game also features in a different way) and playing with the somewhat wonky physics, it feels like there are infinite solutions to any puzzle! I unfortunately got stuck on a frozen level but I would have loved to play more levels and could definitely see this becoming a polished game on Steam!
Unfortunately I think the countdown timer is made a bit redundant by the ability to restart the level for free. It's not necessarily a bad thing for this strategic type of game, but it does feel tacked on for the sake of the jam rather than a core or impactful element. Perhaps changing the mechanic to affect the duck's speed or require the duck to get to the goal in a certain amount of time instead?
The handdrawn art style is super cute! I think it could have used a little more sound effects if you had more time to work on it, especially indignant quacks for when the duck fell out of the world or got stuck (if there was a countdown from pressing play to the duck reaching the level, expiring the countdown could help the duck realize it will not reach its goal!)
Well done and congrats on shipping the game!