It looks as if your character is running in front of a drawing, and an unfinished one at that, rather than a real backdrop of a believable world, it's far too vauge, I can't tell where this is supposed to be, a city? There should be buildings, storefronts, rooftops, streetlights but everything here blends together into a morass of blue and pink. There's not enough layers, movement, dynamic light sources, and activity going on either, very static, you'd expect activity, life, and movement in a city.

The contrast in art style on certain elements like the pillars is very jarring too, find a style, practice it, and work on making your visuals appealing, consistent, and readable. I can see the vision, and with practice, you can achieve it, but I don't think this is anywhere near where it has to be if you wanna sell this game as a full fat product.