Neat little game!
First off let me commend you for adding progression storing/saving (this is a really nice feature to have as I played a little yesterday and came back to finish it up!)
The artwork is clean and effective. And the music is great! I'm also sorry that you didn't have any cookies [ ;( ].
I personally am also a huge fan of the Metroidvania style progression where you navigate the same large world and then backtrack to unlock more areas in the same. Aka the accessible places increase the longer you play the game, nice touch!
I also like how the character feels rigid and smooth to control (which tends to be a good thing for Metroidvania-style games (like Hollow Knight and Axiom Verge you want the player to have tight/rigid controls), and this game gave me that feeling!
Go treat yourself to a cookie! Game on!