A cool interpretation on the theme.
The aesthetic is charming and overall the art looks very cohesive.
The tutorial is very helpful to the player to get immersive quick and knowing what to do.
My two cents, please take it with a grain of salt.... in further levels where it gets big, it can be off-putting not knowing where the packages and drop-zones are. Since the premise of the game is a delivery service, I feel the player should be able to to tell where things are in one glance (like a mini-map telling what is where). So the player can focus on strategizing which route to go first or which action to take first, not exploring the map. Delivery service shouldn't explore places, they should deliver things efficiently.
Edit: on further play, I discovered that you can zoom-out to locate things quicker. This did alleviate the frustrations I had. I still do wish to see how the game feel if we start each level with a zoom-out screen with the package and drop-zone locations.
All being said, this is a very solid submission!