[DustyPorViva]

The problem is you have a very cold(and bright) grey against warm browns.

You could experiment with changing the hue of the grey to something more warm. Contrast in this instance being used to distinguish floor vs wall isn't as necessary when the walls have a solid black outline, and it's not like it's a platformer where poor readability leads to falling into a pit or something like that.

Though I can't say the hue contrast bothered me much as making the floor brown could lead to having a monotonous feel, but if it becomes a majority complaint I feel that's the direction to take it. Alternatively instead of changing it from cold grey to warm brown, you can experiment with other warm colors.