First of all: Cat Mom (=^･ｪ･^=)
I love this! There were so many fun things to find, especially for a demo. I found myself wandering around and jumping against all the walls to make sure I hadn't missed anything. I love being able to interact with the environment in non-essential ways -- knocking over garbage cans, hitting NPCs with candy, etc. It makes the world feel more real.
Also, the music is incredible, and the pixel art is so charming and full of life.
I'm so excited to play a full game of this. More more more, please!