I understand that you are proud of the art, it's normal, I would be proud of it too. But the game feels little dynamic, and you can quickly get tired of walking at that speed, if I were you I would make the normal speed to be the current running speed and the running speed to be faster, so that it feels more dynamic.
I also find the game beautiful and I love that the Solarpunk style is coming to the videogame scene, I wish you luck and I hope you have a good future.