Enjoyment - It is a fun world to explore. Some parts feel too open/empty, but that can be easily fixed once you start adding some decorations.
Execution - Very good start, and the idea and main character are great :D It feels a bit odd that the jump left and right movement is faster than the running speed, I found myself just jumping the whole time hehe.
Visuals - Great start as well. The character animations are nice~ just need some tile variation/decorations.
Audio - I would suggest making an audio manager or script that takes each sound and slightly changes the pitch randomly. That way if you hear the same sound over and over (like the jump) it is less repetitive.
Metroidvania - Awesome start to a cool idea! Story elements like a lore opening would help set the mood. (My game is missing that too hehe)
Keep it up and good work! And please check out my game when you can :D