Very nice submission! You have made a wide variety of puzzles to resolve with just a few mechanics, well done! 😄
The game feels polished and I love the art style with 2D lights and shadows, it's really charming 😊
I'd recommend making the jump higher or lower depending on how much time you're pressing the jump button, like the Mario Bros games. There were a few instances where that would have saved me some trouble hehe
I'd also revisit some of the puzzles to adjust them. For the most part they are fine and it's easy to see what you want the player to do, but there are a few instances where it's a little confusing and I had to resolve them in less conventional ways 😆
Good job overall!