It's a good starting point. There seems to be a lot going on for such a relatively small area, but that may well be the intent.
A key that shows what the intent of each symbol is might help with understanding the map. I'm not familiar with that symbol set and don't have a good idea what each one might represent.
The overall map might pop a little more if there was a dark stroke along the coastline to better match the feel of the buildings and roads. Adding a bit of crinkly detail to that stroke would smooth out the smooth and blobby feel of the coastline.
I'm guessing the bright green parts are forest elements; the brightness on them could probably be toned down a bit to make them look somewhat less radioactive.
If you can, a white stroke around the map scale bar and its labels would make them more legible. They are currently black on dark blue, which my old eyes have trouble distinguishing well.