Nice little game, very cozy! The sound fx and visuals are good, but it can be hard to count squares. I think you also implemented flags but didn't include a visual for them, and they don't reset in the next level, so it was very confusing why I couldn't place a square.
Most of your levels have a flaw: they are symmetrical, making them way easier to complete.
I love the animations at the end of each level! Its like the object comes to life!