prisma kelp
The first problem I see is that the "city theme" isn't really showing or not really noticeable throughout the level
The second problem is that the monochrome part of the level isn't really monochrome. There should be less glow in the level.
Solution 1
The Two things I would do is to make the level have a more crowded atmosphere by making more structures in the level and in the background. The second thing I would add is more flashing squares with different monochrome colors to make it more lively and more of a city.
Solution 2
I would simply remove some of the glow in the foreground of the level and Change them with different shades of grey instead of just pure white.
flat heath
supple lantern