This game is awesome! First thing first, the art is fabulous! The pixel art is so nice, why do you even take the time to draw each artwork in each of the levels! The main character is also so adorable, kinda want a plush of it ngl. The puzzles and level designs are nicely done, and there are so many levels with challenge levels too. What a treat! As a puzzle game lover, this makes me very happy. I like this very much!
The are a few issues/suggestions I would like to bring up. The item snaps to an invisible grid is very nice, but I would really want to see that grid too. It can be just when you are placing objects, as it's quite difficult to locate the exact same position you want to put them in. Paired with the fact that you will probably play the same level with the same setup over and over again, it would be nice if that could reduce some of the repetitiveness of the game.
Some of the physics-based puzzles are kind of harsh, and it seems like even with the correct solutions it will take multiple tries to complete. It makes the player worried that their solution may not be the correct one and try another solution, and that is not really a good feeling, especially when you are playing a puzzle platformer. I will also suggest cutting out the first walk from the door to the treasure after you first reset each level. It's nice to have the player walking through the levels the first time around, setting up the stage and everything, but since it's not a part of the challenge it sort of becomes chores after a few resets. Just spawning the player next to the treasure afterwards should not take away much from the game, and will put the player straight back into the action. It can also remedy the frustration players get when they are dying over and over.
Anyway with all that's said, this is a very good entry! Haven't seen much good puzzle games so far in the jam, and I am enjoying every second of the game! Well done!