Very cute characters and lovely event illustrations, I really like your color choices! The pixelated map sprites are wonderful, and I hope you have plans to give them some sexy animations if you expand the project!
The sound effects are nice, you just need to find a cheerful music track to match them.
The shift key should just toggle running on or off on a press rather than a hold. I couldn't find a way to close the illustrations other than exiting using the top left button and playing again, and the question mark picture just wouldn't close at all for me.
I can see this grow into something special if you keep up the development, there's enough here already to get my mind wondering about other stuff that may happen in your little city! Nicely done!