I really liked this! The art and puzzle concepts are both really cool.
I also got stuck on the snowman wall because it's not very intuitive that you can push the snowman after he forms (because running into him kills him, but if when he spawns and you're pushing him, he gets pushed). It kinda feels like a bug that you could do that, but luring the snowman over doesn't work.
Also, I don't think I saw any prompt for the button to interact with the guy who wants the sunflower so that also took a bit to figure out.